A convenient route to alkyl, alkynyl and aryl substituted 7-azabicyclo[2.2.1]heptadienes
作者:Chunming Zhang、Mark L Trudell
DOI:10.1016/s0040-4020(98)00466-9
日期:1998.7
3-Bromopropiolates underwent a smooth [4+2] cycloaddition reaction with N-acylpyrroles to afford N-acyl-2-alkoxycarbonyl-3-bromo-7-azabicyclo[2.2.1]heptadienes in good yields. The 3-bromo-2,7-dimethoxycarbonyl-7-azabicyclo[2.2.1]heptadiene was further transformed to 3-alkyl-, 3-alkynyl- and 3-aryl-2,7-dimethoxycarbonyl-7-azabicyclo[2.2.1]heptadiene derivatives via palladium catalyzed and organocopper