Intermolecular benzyne cycloaddition (IBC), a versatile approach to benzophenanthridine antitumor alkaloids. Formal synthesis of nitidine and chelerythrine
摘要:
A new approach to the synthesis of benzophenanthridine alkaloids is described which is based on cycloaddition of arynes to pyrrolinediones, the pyrrolinediones behaving as aza diene equivalents. The synthesis of 2,3,8,9-substituted benzophenanthridines and the regioselective synthesis of a 2,3,7,8-substituted benzophenanthridine were performed. The formal synthesis of chelerythrine and the antitumor alkaloid nitidine is described.
Intermolecular benzyne cycloaddition (IBC), a versatile approach to benzophenanthridine antitumor alkaloids. Formal synthesis of nitidine and chelerythrine
摘要:
A new approach to the synthesis of benzophenanthridine alkaloids is described which is based on cycloaddition of arynes to pyrrolinediones, the pyrrolinediones behaving as aza diene equivalents. The synthesis of 2,3,8,9-substituted benzophenanthridines and the regioselective synthesis of a 2,3,7,8-substituted benzophenanthridine were performed. The formal synthesis of chelerythrine and the antitumor alkaloid nitidine is described.
Novel entry into the benzo(C)phenanthridine skeleton through the intermolecular benzyne cycloaddition (IBC) approach
作者:Gloria Martin、Enrique Guitián、Luis Castedo、José M Saá
DOI:10.1016/s0040-4039(00)96137-9
日期:——
A highly convergent synthesis of the skeleton of benzo(c)phenanthridinealkaloids based on the intermolecular benzyne cycloaddition (IBC) approach is described.