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The reduction is assumed to occur on the alumina surface, since its absence results in a negligible conversion of the starting sulfoxide.

The oxidation of aliphatic and alicyclic secondary alcohols with chromium(VI) trioxide in the presence of “wet”-aluminum oxide in hexane gave the corresponding ketones in excellent yields under mild conditions.

The oxidation of 2,6-di- and 2,4,6-tri-substituted phenols with cobalt(III) acetate has been investigated in acetic acid under an inert atmosphere; the former gave the corresponding diphenoquinones in excellent yields, and the latter yielded side-chain or nuclear acetoxylated products in moderate to good yields.

Aliphatic primary alcohols and 1,ω-diols were oxidized to the dimeric esters and lactones, respectively, by peracetic acid in ethyl acetate in the presence of sodium bromide under mild conditions. Aliphatic secondary and benzylic alcohols were converted smoothly to the corresponding carbonyl compounds by the same system.

The title oxidation has been performed in dichloromethane in the presence of “wet”-montmorillonite and -kaolin. The substrates studied include dialkyl, alkyl aryl, diaryl, and cyclic sulfides, which give the corresponding sulfoxides in good yields under neutral and mild conditions.

Oxidation of cycloalkanones with Oxone in dichloro methane in the presence of “wet-alumina” afforded lactones in good yield under mild conditions.

The title oxidation of diols with two primary hydroxy groups (symmetrical diols) and those with both a primary and a secondary hydroxy group (unsymmetrical diols) gives the corresponding lactones or the hydroxy ketones, being dependent upon the types of diols.

The title oxidation of a variety of sulfides was effectively performed in dichloromethane in the presence of H+-exchanged zeolite F-9, affording the corresponding sulfoxides in good yields under mild and neutral conditions.

Dispersion of CrO3 and a “wet” -alumina in hexane, followed by a simple work-up, affords the title reagent, which is valid for the chemoselective oxidation of a wide range of alcohols for an extended period.

(1995). OXIDATION OF VARIOUS ALCOHOLS WITH IN SITU GENERATED MONTMORILLONITE K10-SUPPORTED FERRIC NITRATE REAGENT IN AN APROTIC SOLVENT. Organic Preparations and Procedures International: Vol. 27, No. 6, pp. 703-706.

A variety of unsubstituted and mono- or di-substituted cycloalkanones can be oxidised with modest excess of magnesium monoperoxyphthalate hexahydrate in acetonitrile to produce the corresponding lactones in a facile, selective, and high yielding manner.

— Aromatic, aliphatic, and alicyclic thiols can be readily oxidized to the disulfides quantitatively by calcium hypochlorite and moist Montmorillonite K10 under mild and neutral conditions.

1,3-Dithianes derived from aromatic, aliphatic, and alicyclic ketones or aldehydes can be conveniently converted to the parent carbonyl compounds with a combination of ferric nitrate and silica gel in hexane in excellent to quantitative yields.

The dichloromethane-alumina biphasic system is a simple and effective reagent for the selective oxidation of sulfides to the sulfoxides with calcium hypochlorite.

A combination of sodium chlorite, (salen)manganese(III) catalyst, and chromatographic neutral alumina in dichloromethane can be successfully utilized for the aromatic monochlorination of a variety of alkyl phenyl ethers in excellent to quantitative yields under mild and anhydrous conditions.

Regioselective and high-yielding nuclear monobromination of aromatic ethers can be accomplished with a combination of NaClO2, NaBr, and Mn(acac)3 catalyst in dichloromethane under mild and neutral conditions with the aid of Montmorillonite K10.

Oxidation of α,ω-diols with sodium bromite can be readily performed in dichloromethane to afford lactones in fair good yield under mild and neutral conditions with the aid of chromatographic acidic alumina.

Chlorination of a variety of aliphatic, alicyclic, and aromatic ketones with a reagent combination of NaClO2 and Mn(acac)3 catalyst can be readily performed in dichloromethane to afford α-chloroket...

Nuclear monobromination of aromatic ethers can be achieved with a NaClO2/NaBr/Mn(acac)3 catalyst/silica gel system in dichloromethane in regioselective and high-yielding manner under mild conditions.

(1998). A SIMPLE REGIOSELECTIVE NUCLEAR BROMINATION OF ALKYL PHENYL ETHERS. Organic Preparations and Procedures International: Vol. 30, No. 2, pp. 218-222.

Aliphatic, alicyclic, and aromatic alkenes underwent smooth vic-dichlorination upon treatment with a reagent combination of NaClO2, Mn(acac)3 catalyst, and chromatographic neutral alumina preloaded with a small amount of water in dichloromethane under mild conditions.

(1998). SYNTHESIS OF DISULFIDES BY THE OXIDATIVE COUPLING OF THIOLS WITH CALCIUM HYPOCHLORITE AND SILICA GEL IN HEXANE. Organic Preparations and Procedures International: Vol. 30, No. 3, pp. 360-363.

An inexpensive combination of common laboratory reagents, dimethyl sulfoxide (DMSO) and chromatographic neutral alumina, gives an efficient, selective, and high-yielding oxidation of aromatic, aliphatic and alicyclic thiols to the corresponding disulfides in excellent yields under relatively mild conditions.

Moist kaolin catalyses the regioselective and high-yielding chlorination and bromination of C6H5OR (R=C1–C8 alkyl, But, allyl, cyclohexyl, benzyl) to 4-XC6H4OR (X=Cl and Br, respectively) with NaClO2 and Mn(acac)3 in CH2Cl2 in the absence and presence of NaBr, respectively, under mild and neutral conditions.

A combination of NaBH4 and alumina preloaded with a small amount of water is a highly efficient reducing agent for cycloalkanones, substituted cyclohexanones and unsaturated and aromatic ketones in hexane, affording the corresponding alcohols in excellent yields under mild conditions (20–60°C).

An inexpensive, stable, commercially available reagent, chemical manganese dioxide, can be used for the oxidation of a wide variety of benzylic alcohols and the C–C bond cleavage of aromatic diols in hexane under relatively mild conditions.

A variety of aromatic, aliphatic, and alicyclic thiols were readily oxidised with a combination of sodium iodate and chromatographic neutral alumina in hexane to afford the corresponding disulfides in excellent yields under mild and neutral conditions.

Selective and high-yielding synthesis of alcohols can be easily achieved by the reduction of a variety of ketones and aldehydes with a combination of inexpensive and readily available laboratory reagents, NaBH4 and silica gel, in hexane under mild and neutral conditions.

A broad range of aliphatic, alicyclic, and aromatic ketones and aldehydes underwent smooth reduction with a combination of common, inexpensive laboratory reagents, sodium borohydride and chromatogr...

A cationic rhodium(I)/BINAP complex catalyzes partial intramolecular [2+2+2] cycloadditions of 1,6- and 1,7-diynes with enol ethers or a ketene acetal giving substituted benzenes in good yields. The same catalyst also catalyzes complete intermolecular [2+2+2] cycloadditions of two different monoynes with enol acetates giving tri- and tetrasubstituted benzenes in good yields with complete regioselectivity. Commercially available liquid enol ethers and acetates can be used as versatile equivalents for gaseous alkynes in the present rhodium-catalyzed formal cross-alkyne cyclotrimerizations.

A cationic palladium(II)/(S)-xyl-Segphos complex catalyzes enantioselective cycloisomerizations of N-alkenyl arylethynylamides leading to axially chiral 4-aryl-2-pyridones in high yields with high ee values. The present catalysis represents the first enantioselective construction of axial chirality by the transition-metal-catalyzed cycloisomerization.

A new route to substituted phenols has been developed by cationic rhodium(I)/BINAP complex-catalyzed decarboxylative [2 + 2 + 2] cycloadditions of 1,6- and 1,7-diynes with commercially available vinylene carbonate.

A cationic rhodium(I)/BIPHEP complex catalyzes amide-directed regioselective alkenylations of olefinic or aromatic sp2 C−H bonds in good yields under mild reaction conditions. The use of a 1-pyrrolidinecarbonyl group as a directing group dramatically accelerates the reaction.

A new method for the convergent and rapid assembly of substituted 2-pyridones was developed through the formation of N-alkenyl alkynylamides (amide-linked 1,5-enynes) by N-acylation of imines with alkynoyl chlorides and the subsequent cationic Au(I)/PPh3-catalyzed cycloisomerization.

A cationic rhodium(I)/(R)-H8-BINAP or (R)-Segphos complex catalyzes an intramolecular [2 + 2 + 2] cycloaddition of unsymmetrical dienynes, leading to fused tri- and tetracyclic cyclohexenes bearing two tertiary or quaternary carbon centers in high yields with high enantio- and diastereoselectivity.

A cationic rhodium(I)-H 8 -BINAP complex catalyzes a [2+2+2] cycloaddition of 1,6- and 1,7-diynes with acyl phosphonates in high yields with high regioselectivity. Interestingly, the reactivity of α,ω-diynes toward acyl phosphonates is highly dependent on their own structures.