Reactions of 2H-azirines with carbenoids from diazo esters: transformations of novel azirinium ylides
作者:Alexander F Khlebnikov、Mikhail S Novikov、Amer A Amer
DOI:10.1016/j.tetlet.2004.06.038
日期:2004.7
Thermocatalytic decomposition of diazo esters in the presence of 3-aryl-2H-azirines gives rise to azirinium ylides. The latter preferentially transform via isomerization into 2-azabuta-1,3-diene derivatives or, with excess diazo compound, via reaction with the Rh-carbenoid to form 3,4-dihydro-2H-pyrrole derivatives. In contrast, ylides generated from 2-monosubstituted or 2,2-disubstituted 3-phenyl-2H-azirines