SYNTHESIS AND TRANSFORMATIONS OF INO-1-(4,5-DIHYDRO-1H-IMIDAZOL-2-YL)BENZIMLDAZOLES - A ROUTE TO ZO[4,5]IMIDAZO[1,2-C]IMIDAZO[1,2-A][1,3,5]TRIAZINE RING-SYSTEM
F. Saczewski et al., SYNTHESIS AND TRANSFORMATIONS OF INO-1-(4,5-DIHYDRO-1H-IMIDAZOL-2-YL)BENZIMLDAZOLES - A ROUTE TO ZO[4,5]IMIDAZO[1,2-C]IMIDAZO[1,2-A][1,3,5]TRIAZINE RING-SYSTEM, Heterocycles, 48(9), 1998, pp. 1879-1885
Starting from yl)-2-oxo-2,3-dihydrobenzimidazole-1-carbonitriles (la-e
) the ino-1-(4,5-dihydro-1H-imidazol-2-yl)benzimidazoles (2a-e) and -1
H-imidazol-2-yl)-2-oxo-2,3-dihydrobenzimidazoles (3a-e) have been synt
hesized. Cyclocondensation of 2a with acetic anhydride or acyl chlorid
es gave novel functionalized drobenzo[4,5]imidazo[1,2-c]imidazo[1,2-a]
triazines (4a-d).