Efficient Synthesis of Chromones with Alkenyl Functionalities by the Heck Reaction
作者:Tamás Patonay、Attila Vasas、Attila Kiss-Szikszai、Artur M. S. Silva、José A. S. Cavaleiro
DOI:10.1071/ch10295
日期:——
the Heck reaction in the field of chromones has been demonstrated. Bromochromones with the halogen atom in their rings A and B were reacted with various terminal alkenes to give hitherto unknown alkenyl‐substituted chromones. Reactivity of the substrates was found to markedly depend on the position of the bromineatom. Under phosphine‐free conditions using a phase‐transfer catalyst additive (tetrabutylammonium