Azirinium ylides from alkoxycarbonylcarbenoids and 2H-azirines: Generation and transformations
摘要:
Dirhodium tetraacetate-catalyzed decomposition of diazo esters in the presence of 3-aryl-2H-azirines having no substituent in the 2-position gives rise to azirinium ylides which then undergo isomerization into 2-azabuta-1,3-diene derivatives or (in the presence of excess diazo ester) react with the corresponding rhodium carbenoid to form substituted 3,4-hydro-2H-pyrroles. 2-Mono- and 2,2-disubstituted 3-phenyl-2H-azirines react with rhodium carbenoids generated from diazo esters to give azirinium ylides which are converted into the corresponding 2-azabuta-1,3-dienes.
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
Azirinium ylides from alkoxycarbonylcarbenoids and 2H-azirines: Generation and transformations
作者:A. F. Khlebnikov、M. S. Novikov、A. A. Amer、R. R. Kostikov、J. Magull、D. Vidovic
DOI:10.1134/s1070428006040075
日期:2006.4
Dirhodium tetraacetate-catalyzed decomposition of diazo esters in the presence of 3-aryl-2H-azirines having no substituent in the 2-position gives rise to azirinium ylides which then undergo isomerization into 2-azabuta-1,3-diene derivatives or (in the presence of excess diazo ester) react with the corresponding rhodium carbenoid to form substituted 3,4-hydro-2H-pyrroles. 2-Mono- and 2,2-disubstituted 3-phenyl-2H-azirines react with rhodium carbenoids generated from diazo esters to give azirinium ylides which are converted into the corresponding 2-azabuta-1,3-dienes.