Reversing the Role of the Metal−Oxygen π-Bond. Chemoselective Catalytic Reductions with a Rhenium(V)-Dioxo Complex
作者:Joshua J. Kennedy-Smith、Kristine A. Nolin、Haluna P. Gunterman、F. Dean Toste
DOI:10.1021/ja029498q
日期:2003.4.1
biological and synthetic reactions. However, the majority of these processes result in the oxidation of the target organic substrate; applications of this class of metalcomplexes to other organic transformations are extremely rare. In this paper, we report a new type of catalytic process in which complexes with metal−oxygen multiple bonds are used as reductants rather than oxidants. The overall reaction
Dioxomolybdenum(<scp>vi</scp>) complexes as catalysts for the hydrosilylation of aldehydes and ketones
作者:Patrícia M. Reis、Carlos C. Romão、Beatriz Royo
DOI:10.1039/b514930d
日期:——
The dioxomolybdenum(VI) complexes [MoO2Cl2] (1), [MoO2(acac)2] (2), [MoO2(S2CNEt2)2] (3), [CpMoO2Cl] (4), [MoO2(mes)2] (5) and the polymeric organotin-oxomolybdates [(R3Sn)2MoO4] [R = n-Bu (6), t-Bu (7), Me (8)] were examined as catalysts for the hydrosilylation of aldehydes and ketones with dimethylphenylsilane. Of these, [MoO2Cl2] (1) was the most efficient catalyst, affording quantitative yields