Synthesis of variously substituted allenediynes and their cobalt (I)-mediated [2+2+2] cycloaddition reactions
作者:Dominique Llerena、Olivier Buisine、Corinne Aubert、Max Malacria
DOI:10.1016/s0040-4020(98)00567-5
日期:1998.8
Syntheses of variously substituted allenediynes where the allene moiety is at the terminal or internal position are described. Their cobalt(I)-mediated [2+2+2] cycloaddition reactions led to the corresponding eta(4)-complexed tricyclic compounds; the regioselectivity of these cyclizations depending on the substitution and the position of the allene is discussed. (C) 1998 Elsevier Science Ltd. Ali rights reserved.