Ruthenium catalyzed selective hydrosilylation of aldehydes
作者:Basujit Chatterjee、Chidambaram Gunanathan
DOI:10.1039/c3cc47593j
日期:——
A chemoselective hydrosilylation method for aldehydes is developed using a ruthenium catalyst [(Ru(p-cymene)Cl2)2] and triethylsilane; a mono hydride bridged dinuclear complex [(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] and a Ru(IV) mononuclear dihydride complex [(η6-p-cymene)Ru(H)2(SiEt3)2] are identified as potential intermediates in the reaction and the proposed catalytic cycle involves a 1,3-hydride migration.
A cationic thiolate-bridged diruthenium complex [Cp*RuCl-(μ2-SPri)2RuCp*][OTf] (Cp* = η5-C5Me5, OTf = OSO2CF3) was found to be an efficient catalyst for the reaction of aromatic aldehydes with hydrosilanes in acetonitrile to give 1,2-diaryl-1,2-disiloxyethanes as the major products.
Highly Efficient and Chemoselective Ruthenium-Catalyzed Hydrosilylation of Aldehydes
作者:Youngshil Do、Junghoon Han、Young Ho Rhee、Jaiwook Park
DOI:10.1002/adsc.201100426
日期:2011.12
The highlychemoselective hydrosilylation of aldehydes was achieved using a ruthenium catalyst activated by a household fluorescent light (30 W) at or below room temperature. The hydrosilylation was almost exclusive to aldehydes over ketones and olefins.
methyl cation bearing N,N′-chelated conjugated-bis-guanidinate (CBG) has been reported. Its use in the catalysis of the hydrosilylation of a wide array of carbonyls, alkenes, and alkynes has been investigated. In addition, its behavior in the catalysis of the chemoselective hydrosilylation of aldehydes in the presence of reducible functional groups has been examined.