5-(3-chlorophenyl)-4,5-dihydro-alpha-(4-methoxyphenyl)-alpha-(1-methyl-1H-imidazol-5-yl)-tetrazolo[1,5-a]quinazoline-7-methanol → 9-(3-chlorophenyl)-4,9-dihydro-alpha-(4-methoxyphenyl)-alpha-(1-methyl-1H-imidazol-5-yl)-tetrazolo[5,1-b]quinazoline-7-methanol

Participants

Reaction Steps

A mixture of intermediate 17 (0.0006 mol) in toluene (10 ml) was stirred and refluxed for 5 hours, then brought to room temperature and the solvent, was evaporated till dryness. The residue was taken up in DCM. The solvent was evaporated till dryness. The residue was purified by column chromatography over kromasil® (10 μm) (eluent: DCM/MeOH/Et3N 95/5/0.5). The pure fractions were collected and the solvent was evaporated. The residue (0.12 g, 40%) was taken up in DCM. The solvent was evaporated till dryness, yielding 0.08 g (27%) of 9-(3-chlorophenyl)-4,9-dihydro-α-(4-methoxyphenyl)-α-(1-methyl-1H-imidazol-5-yl)-tetrazolo[5,1-b]quinazoline-7-methanol (compound 3).

Provenance & Evidence