Regio- and chemoselective catalytic transfer hydrogenation of aromatic nitro and carbonyl as well as reductive cleavage of azo compounds over novel mesoporous NiMCM-41 molecular sieves

graphic Regio- and chemoselective reduction of nitroarenes and carbonyl compounds and reductive cleavage of azo compounds, including bulkier molecules, was achieved by the catalytic transfer hydrogenation method (CTH) using a novel nickel-containing mesoporous silicate (NiMCM-41) molecular sieve catalyst. In addition, the catalyst was also found to behave as a truly heterogeneous catalyst as the yield was practically unaffected

Reductive cleavage of azo dyes and reduction of nitroarenes over trivalent iron incorporated hexagonal mesoporous aluminophosphate molecular sieves

A novel, efficient and eco-friendly iron incorporated hexagonal mesoporous aluminiphosphate (FeHMA) catalyst is put forward for the reductive cleavage of azo functions as well as for the reduction of nitroarenes, including larger molecules, by catalytic transfer hydrogenation (CTH). The results indicate that the transformations occur in elegant and rapid manner with excellent yields. Furthermore, the catalyst can easily be recovered and reused without practically affecting the yields for up to six cycles. (C) 200

Catalytic transfer hydrogenation of nitro and carbonyl compounds over novel Fe(III) substituted hexagonal mesoporous aluminophosphates

Catalytic transfer hydrogenation (CTH) of aromatic nitro and carbonyl compounds over novel Fe(III) substituted hexagonal mesoporous aluminophosphate (FeHMA) molecular sieve catalyst showed excellent regioselectivity/chemoselectivity as well as superior recycling capability. Furthermore, the reduction occurs without affecting other functional groups such as -CN, -CHO, -Cl, -CH3, -OCH3 and -NH2

Catalytic hydrodehalogenation of aryl halides, reduction of nitroarenes and reductive cleavage of azo compounds over mesoporous PdMCM-41 molecular sieves under transfer hydrogenation conditions

A novel, efficient and eco-friendly PdMCM-41 catalyst is put forward for the hydrodehalogenation of aryl halides, reduction of nitroarenes and reductive cleavage of azo compounds by catalytic transfer hydrogenation (CTH) method. The results indicate that the transformations occur in elegant and rapid manner with excellent yields. Furthermore, the catalyst can easily be recovered and reused without practically affecting the yields for up to three cycles. (C) 200

Chemo- and regioselective reduction of nitroarenes, carbonyls and azo dyes over nickel-incorporated hexagonal mesoporous aluminophosphate molecular sieves

Nickel-incorporated hexagonal mesoporous aluminophosphate (NiHMA) molecular sieves were found to be highly efficient heterogeneous catalysts for the chemo- and regioselective reduction of nitroarenes and carbonyl compounds as well as the reductive cleavage of azo functions, including bulkier substrates, by the hydrogen transfer method. (C) 200

Selective reduction of alkenes, alpha,beta-unsaturated carbonyl compounds, nitroarenes, nitroso compounds, N,N-hydrogenolysis of azo and hydrazo functions as well as simultaneous hydrodehalogenation and reduction of substituted aryl halides over PdMCM-41 catalyst under transfer hydrogen conditions

Chemoselective reductions of alkenes, alpha,beta-unsaturated carbonyl compounds, nitro and nitroso compounds, N,N-hydrogenolysis of azo and hydrazo functions as well as simultaneous reduction and hydrodehalogenation of substituted aryl halides, including bulkier substrates, were achieved by catalytic transfer hydrogenation (CTH) using mesoporous PdMCM-41 catalyst. The yields were practically unaffected upon recycling of the catalyst. Further, the CTH process is accomplished without affecting the reduction of any other reducible functional group. (C) 200

Heterogeneous catalytic transfer hydrogenation of aromatic nitro and carbonyl compounds over cobalt(II) substituted hexagonal mesoporous aluminophosphate molecular sieves

Catalytic transfer hydrogenation of aromatic nitro and carbonyl compounds was carried out using novel cobalt(H) substituted hexagonal mesoporous aluminophosphate molecular sieves. The catalyst showed excellent yield with good recycling capability. (C) 2002 .