195195-95-0Relevant articles and documents
Asymmetric Cyanosilylation of Ketones Catalyzed by Bifunctional Chiral N-Oxide Titanium Complex Catalysts
Shen, Yongcun,Feng, Xiaoming,Li, Yan,Zhang, Guolin,Jiang, Yaozhong
, p. 129 - 137 (2007/10/03)
A new bifunctional catalytic system based on chiral N-oxide titanium complexes has been used for the asymmetric cyanosilylation of ketones. Screening of a variety of chiral N-oxide metal complexes resulted in (1R,2S)-1-(2'-pyridylmethyl)-2-(diphenylhydroxymethyl)pyrrolidine N-oxide titanium complex, which gave O-TMS cyanohydrins in good yields with enantiometric excesses of up to 69 percent. A catalytic cycle based on experimental phenomena and studies was proposed to explain the origin of the asymmetric induction.