Chemoselectivity of rhodium carbenoids. A comparison of the selectivity for OH insertion reactions or carbonyl ylide formation versus aliphatic and aromatic CH insertion and cyclopropanation
作者:Geoffrey G. Cox、Christopher J. Moody、David J. Austin、Albert Padwa
DOI:10.1016/s0040-4020(01)81876-7
日期:1993.6
A range of diazocarbonyl compounds 1–9 containing two different functional groups has been prepared, and their rhodium(II) catalysed decomposition studied as a means of probing the chemoselectivity of carbenoid intermediates. The results indicate that whereas OH insertion reactions predominate over cyclopropanation and aromatic insertion reactions, carbonyl ylide formation vs. other competing processes
已经制备了一系列含有两个不同官能团的重
氮羰基化合物1-9,并研究了它们的
铑(II)催化分解作为探测类
胡萝卜素中间体的
化学选择性的手段。结果表明,尽管OH插入反应比
环丙烷化和芳族插入反应占优势,但羰基内
酯的形成与其他竞争过程相比更加精细,并且取决于
催化剂。