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Various benzotriazepine ring systems have been synthesized and examined for biological activity. Moreover, the 1,3,4-benzotriazepin-2-one has been shown to act as a constrained amino amide surrogate in mimics of peptide turn secondary structures. This review examines syntheses of the different benzotriazepine ring systems and heterocycle fused variants as well as their conformational and biological properties. [ABSTRACT FROM AUTHOR]

In the current study, four new benzodiazepine derivatives were synthesized via a reaction of o-phenylenediamine with some chalcone derivatives. The synthesized compounds were characterized by 1H NMR and FT-IR spectroscopies. The antibacterial activity of the obtained diazepines was screened against E. coli, Bacillus subtilis, and Staphylococcus aureus. The results showed that compound 8 had the highest activity toward Bacillus subtilis and Staphylococcus aureus, while compounds 5 and 7 showed the highest activity toward E. coli. To support in vitro studies, docking studies have been performed to determine whether the title compounds (5–8) are inhibitors of the androgen receptor prostate cancer mutant H874Y ligand binding domain bound with testosterone and an AR 20–30 peptide (2Q7K), and the relationship between calculated energies and docking studies has been investigated. Among the synthesized diazepines, compound 5 was subjected to anticancer screening, where its activity against human prostate cancer (PC3) was tested. According to the obtained results, compound 5 has good anticancer activity against PC3.

The oxidative stress model of mouse melanocytes B16F10 was established and the protective effect and mechanism of diazepam on oxidative damage of B16F10 cells were studied. B16F10 cells in good growth state were selected to determine the concentration of hydrogen peroxide and the appropriate dose range of diazepam by MTT method. The protective effect of diazepam on oxidative damage of B16F10 cells was observed by fluorescence detection. Western blot was used to further explore the upstream pathway mechanism of diazepam's protective effect. The experimental results showed that diazepam can significantly reverse cellular oxidative damage, restore cell vitality, increase the expression of anti apoptotic protein Bcl-2 under stress, reduce the level of pro apoptotic protein Bax, and ultimately protect B16F10 cells under oxidative stress. [ABSTRACT FROM AUTHOR]

In this investigation, firstly, 1-(2-amino-phenyl)-N-(aryl) methane diamine derivatives were synthesized by reaction of 2-aminobenzo nitrile with aromatic amines in the presence of aluminum chloride as the catalyst. Then, the reaction of these intermediates with ninhydrin in different conditions was investigated. The reaction between ninhydrin and 2-amino-N'-(aryl) benzimidamide derivatives in water as solvent under reflux conditions resulted in the synthesis of diazepine derivatives. The same results were obtained when the reaction was done in EtOH and in the presence of a few drops of sulfuric acid at room temperature. Also, this reaction was carried out in ethanol as solvent without the presence of sulfuric acid at room temperature which resulted in the synthesis of spiro [indene-2,2ʹ-quinazoline] derivatives. And finally, the reaction was carried out in ethanol as solvent without the presence of sulfuric acid at the reflux conditions which resulted in the synthesis of isoquinolino-quinazoline derivatives. These N-heterocycles compounds are important biologically. Mild reaction conditions, simple procedure and purification and also product diversity with changing conditions are important advantages of this method. Also, to better understanding reaction mechanism on the condensation reactions of 2-amino-N-(aryl) benzimidamides with ninhydrin in different conditions, density functional theory (DFT)-based quantum chemical methods have been applied. Calculated atomic charges suggest that the C-1 (+ 0.54 a.u.) center of ninhydrin is a better electrophile than C-2 (+ 0.42 a.u.) center. [ABSTRACT FROM AUTHOR]

The present review describes the methodologies reported for the synthesis of 1,3‐diazepine derivatives. This heterocyclic moiety forms the core structure of many compounds with potent biological activities. Synthetic strategies by ring closure or ring transformation are discussed. [ABSTRACT FROM AUTHOR]

• Crystal structure elucidated: monoclinic arrangement with P 21/c space group revealed through single crystal X-ray analysis. • Hydrogen bonding dynamics explored: intramolecular O–H···N interactions between the main molecule and uncoordinated water molecule investigated for stability implications. • Comprehensive Hirshfeld surface analysis conducted: highlighted the significance of H...H and H...C/C...H interactions in shaping crystal packing. • Electrochemical performance assessed: potential utility in supercapacitors examined, shedding light on its energy storage capabilities. • Insightful findings: study contributes to understanding N-heteroaromatic compounds' chemistry, emphasizing potential applications in materials science. This study reports the synthesis, spectroscopic characterization and detailed crystal structure analysis of a benzodiazepine compound, 2-methyl-2,4-diphenyl-2,3-dihydro-1H-benzo[b][1,4]diazepine, synthesized from 1,2-phenylenediamine and acetophenone. The crystal structure, determined via single crystal X-ray analysis, reveals the compound's placement within the monoclinic system with the P 2 1 /c space group. The asymmetric unit comprises the main molecule and an uncoordinated water molecule linked through an intramolecular O–H···N hydrogen bond. The crystal packing is influenced by centrosymmetric dimers formed by uncoordinated water molecules through O–H···N hydrogen bonds, along with weak C–H···π interactions. Hirshfeld surface analysis highlights the significance of H ... H and H ... C/C ... H interactions in the crystal packing, providing insight into the intermolecular forces at play. Supercapacitance performance of the GCPE/L DABA electrode was assessed and specific capacitance value of 17.89 mF g −1 was achieved in a 0.1 M Na 2 SO 4 electrolyte. Long-term stability of the GCPE/L DABA electrode was maintained up to 2000 cycles. This study not only elucidates the structural features of the title compound but also sheds light on its potential utility through an investigation into its electrochemical performance via supercapacitor application. [ABSTRACT FROM AUTHOR]

Recently, a yellow Maillard pigment named pyrizepine was identiied from a heated solution containing thiamine and glucose. Here, we examined the formation scheme of this pigment and some biological properties. The mass spectrometry and nuclear magnetic resonance data of pyrizepine prepared from [6-13C] glucose showed that the carbon at 6-position of glucose was inserted at 2 different positions of pyrizepine. 5-(Aminomethyl)-2-methylpyridin-4-amine (AMPA), a degradation product of thiamine, was detected in the reaction solution. The pigment also formed in the solution containing AMPA in place of thiamine. These results showed that pyrizepine formed from AMPA and C4 fragments derived from glucose. Pyrizepine showed antioxidative activities in the superoxide dismutase, 2,2-diphenyl-1-picrylhydrazyl, and H-ORAC assays. The pigment did not show mutagenicity with the Ames test. A trace amount of the pigment was detected in a pan-fried ground pork sample added glucose using liquid chromatography-tandem mass spectrometry. [ABSTRACT FROM AUTHOR]

Complexation of tribenzodiazepinoporphyrazine with Cu(II), Zn(II), and Co(II) acetates has been studied. Cu(II) complex of tribenzodiazepinoporphyrazine forms immediately, therefore Zn(II) and Co(II) acetates have been used as salts. It has been found that the rate of complex formation of tribenzodiazepinoporphyrazine with metal ions in pyridine decreases in the series: Cu(II) > Zn(II) > Co(II), this order agrees well with literature data obtained for tetraazaporphin. When diazepine fragment is replaced by pyrazine one, the rate of porphyrazine complexation with Zn(II) decreases. It is supposed that, in the case of tribenzodiazepinoporphyrazine, the reaction of metal insertion proceeds through formation of outer complex, which favors to the further introduction of zinc(II) ion in coordination center of the macrocycle. The complexation of Zn(II) and Co(II) with studied porphyrazines is characterized by low values of activation energy and entropy, which may indicate the strong solvation of transition state. [ABSTRACT FROM AUTHOR]

An easy access has been demonstrated for seven membered diazepines and a six membered quinoxaline. The reaction proceeds rapidly with low-cost and readily available chemicals at mild temperature and provides straight forward access to diazepines and quinoxaline. All final products are new and confirmed by spectral analysis and by single crystal X-ray analysis. Two crystal structures of the diazepines have very similar compositions, exhibit similar conformations where four condensed and coplanar rings are placed in the same orientation to the rest of molecule.

Privileged structures have been widely used as effective templates for drug discovery. While benzo‐1,4‐diazepine constitutes the first historical example of such a structure, the 1,3 analogue is just as rich in terms of applications in medicinal chemistry. The 1,3‐diazepine moiety is present in numerous biological active compounds including natural products, and is used to design compounds displaying a large range of biological activities. It is present in the clinically used anticancer compound pentostatin, in several recent FDA approved β‐lactamase inhibitors (e.g., avibactam) and also in coformycin, a natural product known as a ring‐expanded purine analogue displaying antiviral and anticancer activities. Several other 1,3‐diazepine containing compounds have entered into clinical trials. This heterocyclic structure has been and is still widely used in medicinal chemistry to design enzyme inhibitors, GPCR ligands, and so forth. This review endeavours to highlight the main use of the 1,3‐diazepine scaffold and its derivatives, and their applications in medicinal chemistry, drug design, and therapy. We will focus more particularly on the development of enzyme inhibitors incorporating this scaffold, with a strong emphasis on the molecular interactions involved in the inhibition mechanism. [ABSTRACT FROM AUTHOR]

In this study, some of Schiff bases, 1,3-oxazepine-4,7-dione and 1,3-diazepine-4,7-dione compounds derived from terephthalaldehyde and substituted aniline have been prepared, Schiff bases (a1-5) which derived from terephthalaldehyde and substituted aniline have been reacted with maleic anhydride and phthalic anhydride to produce 1,3-oxazepine-4,7-dione compounds (b1-10). 1,3-oxazepine-4,7-dione compounds (b1-10) have been reacted with phenyl hydrazine to produce 1,3-diazepine-4,7-dione compounds (c1-10). The prepared compounds were characterized using physical methods, the precise analysis of elements (C.H.N), infrared (IR) and (1H NMR) spectroscopy. The reactions were monitored by. Thin Layer Chromatography (TLC). The antibacterial activity was evaluated for some of the synthesis compounds.ً.

The aim of this work was to carry out a preformulation study on JMV5038 as a new potent cytotoxic agent, and to develop its formulation within vegetable oil-based hybrid submicron particles (HNP) in order to obtain a versatile dosage form against melanoma. JMV5038 was first characterized through physico-chemical tests and it exhibited high melting point and logP value, an important pH-sensitivity that led to the formation of well-identified degradation products at low pH, as well as a substantial solubility value in silylated castor oil (ICO). Then, JMV5038-loaded HNP were formulated through a thermostabilized emulsion process based on the sol-gel cross-linking of ICO. They showed high loading efficiency and their in vitro release kinetic assessed in a biorelevant PBS/octanol biphasic system showed a constant sustained release over one month. The cytotoxic activity and cytocompatibility of HNP were evaluated on A375 melanoma cells and NIH 3T3 cells, respectively. JMV5038-loaded HNP exhibited a slightly enhanced cytotoxic activity of JMV5038 on melanoma cells while demonstrating their safety on NIH 3T3 cells. In conclusion, JMV5038-loaded HNP proved to be an efficient and safe drug subcutaneous delivery system that will be interesting to evaluate through preclinical studies. [ABSTRACT FROM AUTHOR]

Benzodiazepines have psychotropic, sedative, hypnotic, anxiolytic, anticonvulsant, muscle relaxing, and amnesic effects, so they are beneficial for a variety of symptoms such as alcohol dependence, seizures, anxiety disorders, panic, agitation and insomnia., most of them are given orally. The target in this study is synthesis of bicycles from Diazepine by cyclization step in two paths (from reaction of Oxazepine compound with and primary amine, or via reaction of imine compound with phthalamide, or via reaction of Diazepine with other amine by insertion reaction to yield other Diazepine from new type. All prepared compounds investigated by types of instrumental methods like (FT.IR, H.NMR, Mass)-spectrophotometric, other chemical characterization, with evaluation of formatted compounds as antibacterial compounds. [ABSTRACT FROM AUTHOR]

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In this study, some of the new compounds have been synthesized including some of different Schiff bases (1-6) via the reaction of phenyl-1,4-diamine with substituted benzaldehyde in absolute ethanol and converted into derivatives of 1,3-oxazepine-4,7-dione (7-12) via ring closure reaction [2+5] of Schiff bases with maleic anhydride in dry benzene then the 1, 3- oxazepine -4, 7- compounds (7-12) were reacted with phenylhydrazine to produce 1,3-diazepine-4,7-dione (13-18). The prepared compounds were characterized by determination of melting point, FT-IR and UV-Visspectra, and some of the prepared compounds have been characterized by (1H-NMR& C.H.N.) techniques.

Abstract Lung cancer is the notable cause of cancer associated deaths worldwide. Recent studies revealed that the expression of matrix metalloproteinases (MMPs) is extremely high in lung tumors compared with non-malignant lung tissue. MMPs (-2 and -9) play an important part in tumor development and angiogenesis, which suggests that creating potent MMP-2 and -9 inhibitors, should be an important goal in lung cancer therapy. In the present study, an effort has been made to develop new anti-metastatic and anti-invasive agents, wherein a series of novel diazepine substituted cinnamic acid derivatives were designed, synthesized and assayed for their inhibitory activities on MMP-2 and MMP-9. These derivatives were prepared via microwave assisted reaction of tert-butyl (3-cinnamamidopropyl)carbamate derivatives mixed with 2,3-dibromopropanoic acid and potassium carbonate was added to obtain 4-(tert-butoxycarbonyl)-1-cinnamoyl-1,4-diazepane-2-carboxylic acid derivatives. The newly synthesized compounds were characterized by IR, NMR and mass spectroscopy. All the tested compounds showed good to excellent cytotoxic potential against A549 human lung cancer cells. The active compounds displaying good activity were further examined for the inhibitory activity against MMPs (-2 and -9). In addition, the structure and anticancer activity relationship were further supported by in silico docking studies of the active compounds against MMP-2 and MMP-9.

One-pot synthesis Green synthesis Crystal structures Up to 80% yield An easy access has been demonstrated for seven membered diazepines and a six membered quinoxaline. The reaction proceeds rapidly with low-cost and readily available chemicals at mild temperature and provides straight forward access to diazepines and quinoxaline. All final products are new and confirmed by spectral analysis and by single crystal X-ray analysis. Two crystal structures of the diazepines have very similar compositions, exhibit similar conformations where four condensed and coplanar rings are placed in the same orientation to the rest of molecule. [ABSTRACT FROM AUTHOR]

An efficient synthesis and fluorescent properties of a new series of fused pyrimidine derivatives are described. Condensation of aminopyrimidine derivative 1 with acetophenone leads to olefinic pyrimidine 2, various addition-cyclization reactions of which give the corresponding bicyclic pyrimidines 4, 6, and 8. Cycloaddition reaction of pyrimidine 1 to benzoyl isothiocyanate gives thiourea derivative 9. Intramolecular cyclization of compound 9 with NaOH or Br2 produces pyrimidine derivatives 10 or 12, respectively. Heteroannulation of pyrimidine 1 with ninhydrin or α-carbonyl carboxylic acid 15 gives the tetracyclic pyrimidine 14 and diazepine derivative 18, respectively. Fluorescence properties of pyrimidine derivatives have been tested. [ABSTRACT FROM AUTHOR]

This research describes a simple and efficient one-pot synthetic approach for the preparation of tetrahydrodiazepine and dihydropyrazine (or dihydroquinoxaline) derivatives in high yields in the presence of a substoichiometric amount of ammonium chloride as a green accelerator on water at 50 °C within 1–3 h. [ABSTRACT FROM AUTHOR]

6-Acetylbenzo[b]chromeno[2,3-e][1,4]diazepin-13(6H)-one 6 was synthesized by reaction of 4- oxo-4H-chromene-3-carboxaldehyde 1 with 1,2-diaminobenzene 2 followed by cyclisation of formed Schiff base 3 and spontaneous oxidation of dihydrodiazepine 4 by air oxygen. Finally, diazepine 5 was acetylated at N(6) by reaction with acetic anhydride.

Graphical abstract Highlights • 3,4,4,5-Tetrachloro-4 H -1,2,6-thiadiazine reacts with cat. BnEt 3 NCl to give a mixture of mono- and polycyclic heterocycles. • Single crystal X-ray studies support the structures of four minor products. • Independent synthesis for 8-bromo-4-chloropyrrolo[2′,1′:2,3]imidazo[4,5- c ][1,2,6]thiadiazine-6,7-dicarbonitrile. Abstract 3,4,4,5-Tetrachloro-4 H -1,2,6-thiadiazine was reacted with BnEt 3 NCl (10 mol%) to give perchloro-9-thia-1,5,8,10-tetraazaspiro[5.5]undeca-1,4,7,10-tetraene (up to 18% yield), 4,5,6-trichloropyrimidine-2-carbonitrile (up to 44% yield) and four minor side products: 2,7-dichlorothiazolo[5,4- d ]pyrimidine-5-carbonitrile, 2-(4-chloro-6 H -thiazolo[5,4- c ][1,2,6]thia-diazin-6-ylidene)malononitrile, 4,8-dichloropyrrolo[2′,1′:2,3]imidazo[4,5- c ][1,2,6]thiadiazine-6,7-dicarbonitrile and 4,7-dichloro-[1,2,6]thiadiazino[3,4- b ]thiazolo[5,4- e ][1,4]diazepin-9(10 H)-one. Single crystal X-ray studies support the structures of the minor products. Tentative rationale for the formation of these minor products and the synthesis of 8-bromo-4-chloropyrrolo[2′,1′:2,3]imidazo[4,5- c ][1,2,6]thiadiazine-6,7-dicarbonitrile are presented. [ABSTRACT FROM AUTHOR]

To find a Maillard pigment derived from thiamine, a solution containing glucose and thiamine was heated and analyzed with high-performance liquid chromatography equipped with diode-array detection. As a result, a unique peak showing an absorption maximum at 380 nm was detected. This peak was then isolated from a reaction solution containing glucose, lysine and thiamine, and was identified as 1-(2-methyl-6,9-dihydro-5H-pyrimido[4,5-e][1,4]diazepin-7-yl)ethan-1-one using instrumental analyses. This compound, named pyrizepine, was a novel yellow pigment having a fused ring consisting of pyrimidine and diazepine. Pyrizepine was a major low-molecular-weight pigment in the reaction solution. The structure suggests that pyrizepine is formed by condensation reaction between a degradation product of thiamine and a tetrosone derivative formed from glucose by the Maillard reaction. [ABSTRACT FROM AUTHOR]

A regioselective approach was developed for the synthesis of dipyrrolo-diazepine derivatives. The synthetic route to dipyrrolo-diazepines first involves the synthesis of dipyrromethanes, followed by reaction of propargyl bromide in the presence of NaH to attach one alkyne functionality to the pyrrole nitrogen atom. Intramolecular heterocyclization with NaH in DMF between the alkyne functionality and pyrrole nitrogen atom gave the desired structures in good yields. [ABSTRACT FROM AUTHOR]

Development of drugs for new and persistent diseases will increasingly rely on the expansion of accessible chemical space to allow exploration of novel molecular targets. Here we report the synthesis of a library of novel fused heterobicyclic small molecules based on the 1,4-diazepine and 2,4-pyrrolidinedione scaffolds. Key chemical transformations included a Mannich-type condensation and chemoselective N -acylation reactions. Screening shows anti-cancer activity of several library compounds which suggests translational potential of this novel chemical scaffold. [ABSTRACT FROM AUTHOR]

A practically reliable procedure for synthesis of new 1,5-bis( N -substituted 1,2,3‒triazole) benzodiazepinedione derivatives was reported by sequential amidation, propargylation and a click azide‒alkyne [3 + 2] cycloaddition reaction in a one pot fashion. The desired products were characterized by CHN analysis, 1 H and 13 C NMR and ESI-MS spectroscopy. Short reaction time, good yields (55–91%), mild reaction conditions and easily available and less expensive starting materials are advantages of this protocol. Natural bond orbital charge distribution and HOMO-LUMO analysis of the characterized structure of 4e have been also calculated by density functional theory (DFT) calculations. The Li + and Na + ion affinities of 4e have been also investigated by DFT studies to find the applicability of these products as ligand in coordination chemistry. Sodium ion affinity of 4e was determined as 60 kJ mol −1 is less than its lithium ion affinity, indicating that the lithiation of 4e is more exothermic than the sodiation. [ABSTRACT FROM AUTHOR]

WAY-267,464 ( 1 ) and twelve conformationally rigid analogues ( 3a-f–4a-f ) were synthesised, characterised and evaluated in cellular assays with the aim of systematically exploring interactions with the oxytocin receptor (OTR). Each analogue was evaluated in radioligand binding displacement assays at both human OTR and arginine vasopressin 1a receptors (V 1a R). Physiological characterisation was determined by whole cell IP1 accumulation assays on stably transfected human embryonic kidney (HEK) cells. Incorporation of the rigid, optionally substituted benzene ring abolished OTR activity and diminished V 1a R pharmacology when compared to 1 . A general trend was observed in V 1a R affinity for the propyl analogues ( 3d-3f ) which identified the ortho -substituted analogue as the best in series (Ki = 251 nM) followed by a decrease in affinity through the meta and para -derivatives ( 3e ; Ki = 874 nM and 3f ; Ki = 1756 nM respectively). This study confirms the importance of the central pharmacophoric motifs of WAY-267,464 and illuminates the differences in the binding pocket of the highly conserved OTR and V 1a R. [ABSTRACT FROM AUTHOR]

This practical studying includes formation of a new Nitrogen-Cyclic compounds (five and seven membered ring) by azotation reaction and condensation reaction, then cyclization with diamine compounds (phenylene diamine, phenyl hydrazine) by some conditions with catalyst to formation di nitrogen cycle compounds. The structure of all formatted compounds was characterized by using many techniques (FT, IR, ¹H. NMR, Mass Spectra, Chromatography-Measurement, Thermal-Measurements)) then studying of physical and chemical characterization and other chemical studies. [ABSTRACT FROM AUTHOR]

In the title compound, C18H20N2O2, the diazepin-2-one ring adopts a tub conformation. The conformation of the acetyl group is partially determined by an intramolecular N—H...O hydrogen bond. In the crystal, pairwise C—H...O hydrogen bonds form inversion dimers.

The reaction of nitropyridine derivatives and tributylphosphine (Bu3P) with the existence of nucleophilic solvent gives ring expansion product as diazepines in medium yield. Reaction mechanism subjected the formation of phenylnitrene, followed by intramolecular electrophilic insertion reaction to pyridine ring and subsequent ring enlargement. The intermediate in the reaction confirmed by computational calculation using B3LYP/6-31G* level. The intramolecular insertion reaction of pyridylnitrene is considered suppressed by the low HOMO (-9.932 eV) energy level of pyridine ring compared to that of benzene (-9.653 eV), hence 1,4-diazepine is obtained when employed 3-nitro-2,6-lutidine as starting material. The formation of diazepines was confirmed by the analysis of 1H NMR data. Separation of the product mixture using column chromatography on SiO2 was carried out and found to give expected diazepine along with the reduction product.

Three new heterocyclic diazepines (CC-diCl, CC-Cl and CC-F) were synthesized for the first time from the natural product curcumin and evaluated as non-toxic corrosion inhibitors for carbon steel (CS) in 1 M HCl. The evaluation was carried out using electrochemical impedance spectroscopy, polarization curves (PDP) measurement, weight loss (WL) and scanning electron microscopy studies. The molecular modeling methods: density functional theory calculations and Monte Carlo simulations were performed to obtain a good insight into the inhibition process. Results obtained from electrochemical techniques and WL tests revealed that, the studied diazepines were effective corrosion inhibitors for CS in the tested medium. Among the evaluated diazepines, CC-diCl showed the highest efficiency. According to the PDP results, the diazepines behaved as mixed-type (cathodic and anodic) inhibitors. A complete thermodynamic study was also performed on the diazepine with the highest efficiency CC-diCl to gain a better understanding of the inhibition process. The adsorption of the diazepines onto CS surface obeyed a Langmuir adsorption isotherm. A good correlation was obtained between the molecular modeling studies and inhibition efficiency ( IE%) of the tested diazepines. [ABSTRACT FROM AUTHOR]

Acetyl benzofurans 1a, 1b reacted with isatins 2a- 2f in the presence of pyridine to give corresponding 3-[2-(1-benzofuran-2-yl)-2-oxoethyl]-3-hydroxy-1,3-dihydro-2 H-indol-2-one derivatives 3a- 3l. Dehydration of the latter in acidic media led to the corresponding α,β-unsaturated ketones 4a- 4l. The structures of newly synthesized compounds 3a- 3l and 4a- 4l were established on the basis of analytical and spectral data. The synthesized compounds were screened for their antibacterial and antifungal activities. Compounds 5d, 5f, and 5h displayed excellent antimicrobial activity. The synthesized compounds were studied for docking on the enzyme, Glucosamine-6-phosphate Synthase. [ABSTRACT FROM AUTHOR]

In this research, two heterogeneous organic-inorganic hybrid catalysts, [bmim][PWO]·3HO and [bmim][PNiWO]·3HO, have been prepared. The catalysts were fully characterized by several techniques such as elemental analyses, Fourier transform infrared spectroscopy, thermo-gravimetric analysis, scanning electron microscope and energy-dispersive X-ray analysis. Next, the hybrid catalysts have been used for the synthesis of functionalized diazepines containing tetrazole ring. Tetrazolyl-1 H-spiro[benzo[b]cyclopenta[e][1,4] diazepines products were obtained in excellent yields and mild experimental conditions using [bmim][PNiWO]·3HO as catalyst. This process was carried out via a one-pot, pseudo-five-component condensation reaction by means of a 1,2-diamine, isocyanide, TMSN3 and two molecules of a linear or cyclic ketone in methanol, at ambient temperature. [ABSTRACT FROM AUTHOR]