Silylcuprates from Allene and Their Reaction with α,β-Unsaturatedd Nitriles and Imines. Synthesis of Silylated Oxo Compounds Leading to Cyclopentane and Cycloheptane Ring Formation
作者:Asunción Barbero、Yolanda Blanco、Francisco J. Pulido
DOI:10.1021/jo0509814
日期:2005.8.1
silylcupration of allenes and the subsequent capture of the intermediate cuprate with α,β-unsaturated nitriles is reported. The influence of the substitution of the nitrile, the nature of the silylcopper species, and the temperature on the selectivity of the reaction is studied. An interesting diaddition process was observed (1,2-addition and 1,4-addition), leading to oxo compounds which simultaneously have an allylsilane
A tandem allylsilane–vinylsilane difunctionalization by silylcupration of allene followed by reaction with α,β-unsaturated nitriles
作者:Asunción Barbero、Yolanda Blanco、Francisco J. Pulido
DOI:10.1039/b103387p
日期:——
Silylcupration of allene using phenyldimethylsilylcopper 1 followed by BF3-mediated reaction with α,β-unsaturatednitriles at −40 °C affords allylsilane–vinylsilane-containing ketones resulting from consecutive addition (1,2 and 1,4) of the intermediate allyl- and vinylcopper species formed in the silylcupration of allene.