A Zwitterionic Silylene as Reactive Intermediate and Its Unusual Dimerization to an N-Heterobicyclic Disilane
作者:Yun Xiong、Shenglai Yao、Matthias Driess
DOI:10.1002/asia.200900127
日期:2009.8.3
transient zwitterionic silylene L′Si: 8 L’=CH[(C=CH2)CMe(N(tBu))2]} and achieve its facile dimerization to the remarkable N‐heterobicyclic disilane 82 is described. At first, employing the β‐diketiminate ligand L [L=CH(CMeN(tBu))2], both starting materials LH (2) and its N‐lithium salt LLi (3) can react with SiBr4 to yield the silylene precursor L′SiBr2 (4) by silicon‐induced CH activation at an exocyclic