Enantioselective trapping of an α-chiral carbanion of acyclic nitrile by a carbon electrophile
作者:Michiko Sasaki、Tomo Takegawa、Hidaka Ikemoto、Masatoshi Kawahata、Kentaro Yamaguchi、Kei Takeda
DOI:10.1039/c2cc00082b
日期:——
An alpha-chiral nitrile carbanion generated by deprotonation of enantioenriched O-carbamoyl cyanohydrin was trapped in situ with ethyl cyanoformate to give the corresponding ester derivative in 92% yield and 90 : 10 er, providing the first example of trapping of an alpha-chiral acyclic nitrile carbanion that has been considered to be very configurationally labile.
将富含对映体的O-氨基甲酰基氰醇去质子化生成的α-手性腈碳负离子用氰基甲酸乙酯原位捕获,以92%的收率和90:10 er得到相应的酯衍生物,这是捕获α-手性无环化合物的第一个例子丁腈碳负离子被认为在构型上非常不稳定。