Enantioselective Reduction of α,β-Unsaturated Acylsilanes by Chiral Lithium Amides
摘要:
Reaction of beta-substituted acryloylsilanes I with lithium amides II affords a-silyl allylic alcohols III in high enantiomeric excess (>99%) via formal hydride transfer from the chiral lithium amide.
Reaction of acylsilanes with potassium cyanide: Brook rearrangement under phase-transfer catalytic conditions
作者:Kei Takeda、Yuji Ohnishi
DOI:10.1016/s0040-4039(00)00560-8
日期:2000.5
The reactions of acylsilanes with KCN under liquid–liquid phase-transfer catalytic conditions proceeded smoothly via the Brook rearrangement to produce O-silylated cyanohydrin derivatives in excellent yields. We also found that α-cyano carbanions generated by the Brook rearrangement in the reaction of (β-(trimethylsilyl)acryloyl)silane 7 can undergo alkylation at the γ-position and that in the reaction