Hydrazine hydrate (1:1) → 6-[(4-tert-butylphenyl)sulfonyl]-2-(trifluoromethyl)-6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepine-8-carbohydrazide

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 6-[(4-tert-butylphenyl)sulfonyl]-2-(trifluoromethyl)-6,11-dihydro-5H-pyrido-[2,3-b][1,5]benzodiazepine-8-carboxylate (intermediate 56, 0.11 g, 0.21 mmol) in ethanol (1.0 mL) at rt was added hydrazine hydrate (0.460 mL). The mixture was heated at 80° C. for 18 h, cooled to rt, and the precipitate was collected by filtration to provide the title compound. LC/MS: m/e 520.1 (M+H)+. 1H NMR (500 MHz, CD3OD): δ 8.00 (1H, s), 7.78 (1H, d, J=8.3 Hz), 7.65 (1H, d, J=7.5 Hz), 7.10-7.16 (3H, m), 6.90-6.95 (3H, m), 4.45-4.70 (2H, br), 1.24 (9H, s).

Provenance & Evidence