Synthesis, thermal reactivity and kinetics of substituted [(benzoyl)(phenylcarbamoyl)methylene]triphenylphosphoranes and their thiocarbamoyl analogues
作者:R. Alan Aitken、Nouria A. Al-Awadi、Graham Dawson、Osman M.E. El-Dusouqi、Dorcas M.M. Farrell、Kamini Kaul、Ajith Kumar
DOI:10.1016/j.tet.2004.10.058
日期:2005.1
A range of 16 substituted benzoyl/arylcarbamoyl and benzoyl/arylthiocarbamoyl stabilised ylides have been prepared. They are found under conditions of flash vacuum pyrolysis to fragment giving a benzoyl ylide and arylisocyanate or isothiocyanate accompanied in some cases by secondary pyrolysis products. Kinetic studies show the thiocarbamoyl ylides to react consistently faster than their carbamoyl