Pd-catalyzed cross-coupling reaction of (Z)- and (E)-bromoenyne: unusual stereochemical outcome
作者:Jun’ichi Uenishi、Katsuaki Matsui、Masashi Ohmi
DOI:10.1016/j.tetlet.2004.11.061
日期:2005.1
Pd-catalyzed cross-coupling reaction of (E)-bromoenyne 1Z with 1-alkyne and tributylvinyl–stannane occurs with retention of the configuration in benzene but with an inversion of the configuration in DMF or CH2Cl2. On the other hand, that of (Z)-bromoenyne 1E occurs with retention of the configuration in these solvents.
(E)-溴代炔1 Z与1-炔烃和三丁基乙烯基-锡烷的Pd催化交叉偶联反应在苯中保留构型,而在DMF或CH 2 Cl 2中发生构型反转。另一方面,(Z)-溴代炔1 E的构型在这些溶剂中保持不变。