Palladium-catalyzed direct functionalization of benzoxazoles with alkenyl iodides
摘要:
A straightforward procedure for the palladium-catalyzed direct functionalization of benzoxazoles with alkenyl iodides is described. The reactions employ a Pd(II)-precatalyst and use 'on water' conditions to achieve the ready union of a range of di- and tri-substituted alkenyl iodides with a small range of benzoxazoles. (C) 2012 Elsevier Ltd. All rights reserved.
CuCl-catalyzed C2-alkenylation reaction of benzoxazoles with allyl halides has been established. The distinctive features of this protocol include the use of an inexpensive copper salt as catalyst, simple and readily available starting materials, and ligand-free conditions. An important application of this method to the synthesis of 1,3-diene substituted benzoxazoles has also been achieved.