A convenient synthesis of N-methyl-3-(2-ethenylphenyl)-1(2H)-isoquinolones, key models for the elaboration of the benzo[c]phenanthridinone and phenanthridine skeletons
摘要:
A variety of N-methyl-3-(2-ethenylphenyl)-1(2H)-isoquinolones 1a-e have been prepared by base-induced intramolecular cyclization of N-(2-ethenylbenzoyl)-N,2-dimethylbenzamide derivatives 2a-e. The concomitant formation of the fused dihydro benzo[c]phenanthridinones 7a-e was also observed during this process.
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.
Intermolecular benzyne cycloaddition (IBC), a versatile approach to benzophenanthridine antitumor alkaloids. Formal synthesis of nitidine and chelerythrine
作者:Gloria Martin、Enrique Guitian、Luis Castedo、Jose M. Saa
DOI:10.1021/jo00048a024
日期:1992.10
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.
MARTIN, G.;GUITIAN, E.;CASTEDO, L.;SAA, J. M., TETRAHEDRON LETT., 28,(1987) N 21, 2407-2408