作者:Elisabet Öberg、Xue-Li Geng、Marie-Pierre Santoni、Sascha Ott
DOI:10.1039/c1ob05705g
日期:——
and consecutive couplings with iodoarenes. In situ transformation of the TMS-protected acetylenes into Cu(I)acetylides is the key step in the synthetic sequence and enables the preparation of the first dimeric A2PA linked by a phenylene spacer. cis–transIsomerization across the PC bond is triggered by a tertiary amine and exclusively observed in the case of nitrophenyl-substituted A2PAs. The introduced
已经研究了双-TMS取代的C,C-二乙炔磷化烯烃(A 2 PA)1在Sonogashira-Hagihara交叉偶联反应中的反应性。选择性的且在两个甲硅烷基的脱保护的连续1由空间体积的MES启用*这使得乙炔基团的反式与MES *更具反应性的,从而有利于选择性的和连续的联接件与iodoarenes。TMS保护的乙炔的原位转化为Cu(I)乙炔化物是合成过程中的关键步骤,并能够制备通过亚苯基间隔基连接的第一个二聚体A 2 PA。整个P C键的顺式-反式异构化是由叔胺引发的,仅在硝基苯基取代的A 2 PA情况下才观察到。光谱和电化学研究证明,引入的芳基是整个π系统的组成部分。