Reactions of homoallylstannanes with carbon electrophiles: stereoselective cyclopropylmethylation based on the γ-effect of tin
作者:Masanobu Sugawara、Jun-ichi Yoshida
DOI:10.1039/a900228f
日期:——
Homoallylstannanes reacted with carbon electrophiles such as acetals, acid chlorides and aldehydes in the presence of Lewis acids to give the cyclopropylmethylated products with high stereoselectivities.
Stereoselective Cyclopropylmethylation Reactions of Homoallylstannanes with Carbon Electrophiles
作者:Masanobu Sugawara、Jun-ichi Yoshida
DOI:10.1016/s0040-4020(00)00389-6
日期:2000.6
The reactions of homoallylstannanes with acetals, aldehydes, and acyl chlorides in the presence of a Lewis acid proceeded smoothly to give the corresponding cyclopropylmethylated products. The reactions of E-3-pentenylstannane with aldehydes were stereoselective and gave the erythro products predominantly. A mechanism involving antiperiplanar attack is suggested. The stereoselectivity of the Z isomer was, however, not high. (C) 2000 Elsevier Science Ltd. All rights reserved.