Alkynylalanes were found to react efficiently with propargylic electrophiles, such as propargyl mesylates and propargyl diethylphosphates. The reaction proceeds with high regioselectivity and does not require copper or any other transition metal.
Copper-Free Synthesis of Skipped Diynes via Cross-Coupling Reactions of Alkynylalanes with Propargylic Electrophiles
作者:Jilali Kessabi、Renaud Beaudegnies、Pierre M. J. Jung、Benjamin Martin、Florian Montel、Sebastian Wendeborn
DOI:10.1021/ol0623769
日期:2006.11.1
Alkynylalanes provide a new, copper-free route to skippeddiynes when combined with propargylic electrophiles bearing an aluminum-complexing leaving group. The reaction is mild, efficient, and, in contrast to copper-mediated methods, highly regioselective. [reaction: see text]