Iterative Synthesis of Deoxypropionate Units: The Inductor Effect in Acyclic Conformation Design
作者:Stephen Hanessian、Navjot Chahal、Simon Giroux
DOI:10.1021/jo061098o
日期:2006.9.1
Conjugateaddition of lithium dimethylcuprate to acyclic α,β-unsaturated esters of varying lengths bearing terminal alkyl or phenyl groups leads to a preponderance of syn 1,3-adducts when one methyl is already present. Conversion to enoates, and iteration of cuprateadditions also favors syn adducts to give contiguous deoxypropionate units in a growing chain. The effect of end-group variation (Me,