The novel 4-(2-hydroxyphenyl)-1,3-dihydro-1,5-benzodiazepine-2-thione (4) has been synthesised and used as precursor to the hitherto unreported 7-methylthio[1]benzopyrano[4,3-c][1,5]-benzodiazepine (7). Hydrazinolysis of 4 gave 5-(2-aminophenylamino)-3-(2-hydroxyphenyl)-1H-pyrazole (9) which with excess of N,N-dimethylformamide dimethylacetal formed the 5-(2-hydroxyphenyl-2H-pyrazol-3-yl)-1H-benzimidazole (10).

2005Multi-membered N-heterocycles R 0690 Reactivity Studies on a Novel 4-(2-Hydroxyphenyl)-1,3-dihydro-1,5-benzodi-azepine-2-thione. -The title compound (II) is used as a precursor of the hitherto unreported derivative (VI). -(GHARBI, R.; BEN-YOUSSEF, M.; MARTIN, M.-T.; MIGHRI*, Z.; J. Chem.