Conversion of epoxides to rhodium enolates: direct evidence for a mechanism involving initial carbon-hydrogen activation
作者:Jianxin Wu、Robert G. Bergman
DOI:10.1021/ja00201a062
日期:1989.9
present case direct detection of an intermediate demonstrates that the reaction takes place by initial C-H activation, rather than by attack at a ring C-O bond, leading to a metalated oxirane. In addition, we have found that conversion of the metalated intermediate to the final reaction product, a C-bond rhodiumenolate, involves predominant 1,2-rearrangement of hydrogen rather than rhodium.
作者希望报告低价金属配合物与环氧乙烷的反应,该反应在现象学上与早先报道的金属诱导的环氧乙烷反应有关。然而,在目前的情况下,中间体的直接检测表明反应是通过初始 CH 活化发生的,而不是通过攻击环 CO 键,导致金属化环氧乙烷。此外,我们发现金属化中间体向最终反应产物 C 键铑烯醇化物的转化涉及氢的主要 1,2-重排而不是铑。
Synthesis and reactions of deuterated 2-(alkylimino)-3-nitrosooxazolidines, 3-alkyl-1-(2-hydroxyethyl)-1-nitrosoureas, and related compounds as possible intermediates in the aqueous decomposition of 3-alkyl-1-(2-chloroethyl)-1-nitrosoureas