Rh(I)-Catalyzed CO Gas-Free Carbonylative Cyclization Reactions of Alkynes with 2-Bromophenylboronic Acids Using Formaldehyde
作者:Tsumoru Morimoto、Kae Yamasaki、Akihisa Hirano、Ken Tsutsumi、Natsuko Kagawa、Kiyomi Kakiuchi、Yasuyuki Harada、Yoshiya Fukumoto、Naoto Chatani、Takanori Nishioka
DOI:10.1021/ol900327x
日期:2009.4.16
The rhodium(I)-catalyzed reaction of alkynes with 2-bromophenylboronic acids in the presence of paraformaldehyde resulted in a CO gas-free carbonylative cyclization, yielding indenone derivatives. [RhCl(BINAP)]2 and [RhCl(cod)]2 were responsible for the decarbonylation of formaldehyde and the subsequent carbonylation of alkynes with 2-haloboronic acids, respectively, leading to efficient whole carbonylation
在多聚甲醛存在下,炔烃与2-溴苯基硼酸的铑(I)催化反应导致不含CO气体的羰基化环化反应,生成茚满酮衍生物。[RhCl(BINAP)] 2和[RhCl(cod)] 2分别负责甲醛的脱羰作用和炔烃随后用2-卤代硼酸的羰基化作用,从而导致有效的整个羰基化作用。在不对称取代的炔烃上的立体大且吸电子的基团有利于茚满的α-位。