An unusual decarboxylative benzannulation and biaryl formation during copper(I)-promoted halogen atom transfer radical cyclization of 2-allylaryl trichloroacetates
作者:Ram N. Ram、Ram K. Tittal、Shailesh Upreti
DOI:10.1016/j.tetlet.2007.09.058
日期:2007.11
CuCl/bpy-promoted halogenatomtransfer radical cyclization of 2-allylaryl trichloroacetates in refluxing benzene gave benzannulated chloroarenes and benzannulated symmetrical biaryls along with reductive dehalogenation products. The unusual decarboxylative benzannulation and biaryl formation might be explained by a further intramolecular radical addition on the benzene ring of the eight-membered lactone