Mechanisms of Allene Stereoinversion by Imidozirconium Complexes
作者:Forrest E. Michael、Andrew P. Duncan、Zachary K. Sweeney、Robert G. Bergman
DOI:10.1021/ja0348389
日期:2003.6.1
stereochemical behavior of metallacycles derived from [2 + 2] cycloaddition of enantioenriched allenes with chiral and achiral imidozirconocene complexes. Relative rates of metallacycle racemization were measured by circular dichroism, and intermediates in the selective stereoinversion of diphenylallene with a chiral imidozirconium complex were observed by NMR spectroscopy. Metallacycles derived from dialkylallenes