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
3-Bromopropiolates接受具有光滑[4 + 2]环加成反应Ñ -acylpyrroles得到Ñ酰基-2-烷氧羰基-3-溴-7-氮杂双环[2.2.1]以良好的收率heptadienes。将3-溴-2,7-二甲氧基羰基-7-氮杂双环[2.2.1]庚二烯进一步转化为3-烷基-,3-炔基-和3-芳基-2,7-二甲氧基羰基-7-氮杂双环[2.2。 1]庚二烯衍生物通过钯催化和有机铜偶联反应。