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The title reaction provides access to a series of alkyl, aryl and hetaryl sulfones (III) and (V) bearing various kinds of functional groups.

A convenient and facile method for the synthesis of homoallylic amines was disclosed. The one-pot reaction of aldehydes, aromatic amines and allylic bromide with tin powder at room temperature could afford the homoallylic amines in good to excellent yield without any promoter or additive. The method is highly efficient and environmentally benign with low cost and concise manipulation. Copyright © 2014 John Wiley & Sons, Ltd.

Weinreb amides were prepared directly from carboxylic acids, N , O -dimethylhydroxylamine, and phosphorus trichloride in one pot at 60 °C in toluene in high yields, thus avoiding the separation of the moisture and air sensitive intermediate P[NMe(OMe)] 3 in advance. Sterically hindered carboxylic acids also give the corresponding Weinreb amides in excellent yields. Various functional groups are tolerated on the carboxylic acid. The method, which is a simple process and gives high yields, is suitable for large-scale production.

The asymmetric unit of the title compound, C20H24N2, contains one half-molecule, with the single C—C bond of the 1,4-diazabutadiene fragment situated on a centre of symmetry. The benzene rings are inclined to the 1,4-diazabutadiene mean plane by 59.5 (1)°.

A rapid and efficient method for synthesis of α, β-conjugated acetylenic ketones involves reaction of phenylacetylene with aroyl chlorides in the presence of catalytic amount CuI under microwave irradiation to give the corresponding α, β-conjugated acetylenic ketones 3 a–i in 76–93% yields.

A rapid and efficient method for synthesis of α,β-conjugated acetylenic ketones involves reaction ofphenylacetylene with aroyl chlorides in the presence of acatalytic amount Pd(PPh3)2Cl2-CuIdoped KF/Al2O3 under microwave irradiationto give the corresponding α,β-conjugated acetylenicketones 3a–g in 81–94% yield.

A rapid and efficient method for synthesis of unsymmetrical ketones involves reaction of sodium tetraphenylborate with aroyl chlorides in the presence of catalytic amount Pd(PPh3)2Cl2 under microwa...

A general and efficient synthetic method of 1,3-bis(phenylseleno)-2-propanol by reducing diphenyl diselenides with sodium borohydride in basic environment and then reacting with epichlorohydrin are described.

A general and efficient synthetic method of 1-phenoxy-3-arylseleno-2-propanol by reducing diary1 diselenides with sodium borohydride in basic environment and their reaction with epoxypropoxyphenols are described.

Under microwave irradiation, boron trifluoride has been found to mediate a new condensation reaction of aryl ketones with triethyl orthoformate to give a series of new products (C1-C10) is described. The compounds were first reported. Their structure were determined by IR, MS, and 1H /13C NMR spectra.

Polymer-bound 2,29-bipyridine cobalt complexes PSBPY-Co, PSBPY-Co-bipy, PSBPY-Co-oxine, and PSBPY-Co-phen (where PSBPY: polystyrene bound-2,29-bipyridine; bipy: 2,29-bipyridine; phen: 1,10-phenanthroline) were synthesized andinvestigated by IR, X-ray photoelectric spectroscopy, thermogravimetry–differentialthermal analysis, inductively coupled plasma atomic emission spectrometry, and ele-mental analysis. The complexes were found to be catalysts for the oxidation of alkyl-benzenes and cyclohexene in the presence of molecular oxygen in the absence of solvent. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1068–1074, 2000 Key words: polymer-bound cobalt complexes; catalysts; alkylbenzenes; cobalt com-plexes; cyclohexene; catalytic oxidation INTRODUCTION Transition metal complex catalyzed oxidation oforganic substrates is a topic of current re-search. 1–8 Cobalt complexes have received muchattention recently due to the potential applicationof these complexes as oxidation catalysts for theoxidation of cyclic althenes, enolizable aldehydes,secondary alcohols, and other organic sub-strates.

A simple, rapid and efficient method for the synthesis of dibenzyl diselenides under microwave irradiation is reported. The effect of microwave irradiation power, times and solvent on the reaction is investigated.

A new method for selective reaction of 1-aryl-propane-1-ones with 3,4-dihydroxy group of D-mannitol in the presence of ZnCl2-BF3- Et2O to 3,4-O-(l-aryl-I-propylidene)-D-mannitol (Cl-Cl1) is described. The compounds were first reported and determined by IR, Ms, 1H/13C NMR spectra. Among them the structure of Cl 1 was further defined by X-ray diffraction.

Nitro group of a- nitrostyrene were readily substituted by organic moiety of organozinc halides under microwave irradiation to give derivatives of styrene in excellent yields.

A simple, rapid and efficient method for the synthesis of 1,3-bis(phenylseleno)-2-propanol under microwave irradiation is described.

Aluminium powder has been used to reduce titanium tetrachloride to generate the low valent titanium (LVT)reagent which can induce the reductive coupling of aldehydes and ketones to form the corresponding pinacols or olefins. However, arylsulfonyl chlorides will give diaryldisulfides under the same condition.

A simple rapid and efficient procedure for the synthesis of 8-quinolinyl ethers via microwave irradiation is reported.

The title reaction provides a mild alternative method for the synthesis of N-substituted carbamates or amides.

The present new method proceeds in the presence of trimethylsilyl chloride which acts as an essential reaction promoter and a protection reagent for the sensitive N-hydroxylamine group.

A convenient reaction of alkyl halides with sulfur in alkaline medium has been found to afford disulfides in good to excellent isolated yield under phase transfer conditions.

A simple and general method for the synthesis of diacyl disulfides is reported. Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65°C under PTC, which can react with acyl halides to afford diacyl disulfides in good to excellent isolated yields. The effects of solvents and phase transfer catalysts are discussed.

A general procedure for the nucleophilic addition of organozinc halides with nitrones in the presence of trimethylsilyl chloride has been developed. Trimethylsilyl chloride was found to be both an indispensable reaction promoter and a ready hydroxylamine protective agent in these reactions. The produced O-(trimethylsilyl)hydroxylamines can be easily reduced into corresponding amines just by a zinc-copper couple in saturated aqueous NH(4)Cl solution.

Bifunctional chiral thioureas have been successfully used as organocatalysts in enantioselective fluorinations of β-keto esters. The corresponding products could be obtained with good to excellent enantioselectivity in high yields by using N-fluorobisbenzenesulphonimide (NFSI) as fluorination reagent.

Acyl chloride can efficiently be converted into anhydride under solid liquid phase transfer catalysis by using bis(triphenylphosphine)cobalt dichloride or bis (triphenylphospine)palladium dichloride as catalyst.

An efficient catalytic 1,4 addition reaction of functionalised organozinc reagents with enones has been developed using a nickel complex as catalyst.

Fluoroalkyl-derivatised R-BINAP ligands have been prepared, characterised and applied in the ruthenium-catalysed asymmetric hydrogenation of dimethyl itaconate.

This study attempts to answer if inexpensive, easily available carbonylated phosphines could be used as CO2-philic ligands to replace the expensive, fluoroalkylated phosphines for catalysis in supercritical CO2 (scCO2). Toward this end, a series of alkoxycarbonylated arylphosphines were examined in the rhodium-catalyzed hydroformylation in scCO2. The reaction rate was found to vary with the number of the carbonyl groups incorporated into the phosphines and with the nature of the olefins.

A convenient and simple method for the synthesis of dibenzyl diselenides under phase transfer conditions is described. The process involves the reaction of selenium with sodium hydroxide at 65–70 °C and under phase transfer conditions to give sodium diselenides, which reacts with benzyl halides to afford the dibenzyl diselenides in good to excellent isolated yields. The reaction mechanism is briefly discussed.

A simple and general method for the synthesis of diacyl disulfides is reported. Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65°C under PTC, which can react with acyl halides to afford diacyl disulfides in good to excellent isolated yields. The effects of solvents and phase transfer catalysts are discussed.

The transmetalation of functionalized organozinc iodides with Cu(OAc)2 in THF provides a new convenient method for the preparation of functionalized organozinc-copper(I) reagents FG-RCu(OAc)ZnI which ultimately undergo 1,4-addition reaction with enones to give the products in good to excellent yields.

Aluminium powder has been used to reduce titanium tetrachloride to generate the low valent titanium (LVT)reagent which can induce the reductive coupling of aldehydes and ketones to form the corresponding pinacols or olefins. However, arylsulfonyl chlorides will give diaryldisulfides under the same condition.

Epoxypropoxyphenols react with benzenethiols under phase-transfer catalysis and microwave irradiation to give chiral glycerol sulfide ethers, this procedure is simple, rapid and efficient.

A simple, rapid and efficient method for the synthesis of 1,3-bis(phenylseleno)-2-propanol under microwave irradiation is described.