The structures of ring-expanded NHC supported copper(<scp>i</scp>) triphenylstannyls and their phenyl transfer reactivity towards heterocumulenes
作者:Rex S. C. Charman、Mary F. Mahon、John P. Lowe、David J. Liptrot
DOI:10.1039/d1dt03109k
日期:——
crystallography. Reaction of (6-Mes)CuSnPh3 with di-p-tolyl carbodiimide, phenyl isocyanate and phenylisothiocyanate gives access to a copper(I) benzamidinate, benzamide and benzothiamide respectively via phenyl transfer from the triphenylstannyl anion with concomitant formation of (Ph2Sn)n. Attempts to exploit this reactivity under a catalytic regime were hindered by rapid copper(I)-catalysed dismutation
通过 (RE-NHC)CuO t Bu 与三苯基锡烷 (RE-NHC = 6-Mes, 6-Dipp, 7-Dipp)反应合成了三种扩环 N-杂环卡宾负载的铜 ( I ) 三苯基锡烷基化合物。通过NMR光谱和X射线晶体学表征化合物。(6-Mes)CuSnPh 3与二对甲苯基碳化二亚胺、异氰酸苯酯和异硫氰酸苯酯的反应分别通过三苯基甲锡烷基阴离子的苯基转移得到苯甲脒铜 ( I )、苯甲酰胺和苯并硫胺,同时形成 (Ph 2 Sn ) ) n. 在催化机制下利用这种反应性的尝试受到铜( I ) 催化的Ph 3 SnH到Ph 4 Sn 的快速歧化、各种全苯基化锡低聚物、H 2和一种被认为是Sn(0) 的金属材料的阻碍。通过核磁共振波谱和质谱的反应监测提供了机理见解。