Cu(I)-Mediated Intramolecular Conjugate Addition of Alkenyltrimethylstannane Functions to α,β-Unsaturated Ketones: A Convenient Preparation of Functionalized cis-Fused Bicyclo[4.3.0]non-8-en-3-ones and Bicyclo[3.3.0]oct-6-en-3-ones
作者:E Piers
DOI:10.1016/s0040-4020(00)00131-9
日期:2000.4.28
A new copper(I)-mediated method for effecting intramolecularconjugateaddition of alkenyl functions to α,β-unsaturated ketone systems is reported. Treatment of the substrates 14, 15, 19–21, 22 and 23 with 2.5 equiv. of CuCl in DMF at room temperature affords excellent yields of the corresponding bicyclic ketones 24, 25, 29–31, 32 and 33. On the other hand, treatment of substances 15–18 with CuCN in