Hydrazine, (2-fluorophenyl)-, hydrochloride (1:1) → HCID 60142048, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of raw methyl 3-(2-chloro-6-fluorophenyl)-5-[2-(dimethylamino)-1-formylvinyl]isoxazole-4-carboxylate (36 mg, 0.102 mmol) in ethanol (460 mg), 2-fluorophenyl hydrazine hydrochloride (16 mg, 0.100 mmol) was added. The mixture was warmed to 55-60° C. until a TLC sample showed no starting enamine. The solution was evaporated to dryness in vacuum, the reside was extracted with 3×10 ml of boiling hexane, and the hexane extracts were combined and concentrated and cooled to room temperature. Crystallization gave 25 mg of desired product (example I-89) (yield 60%). Result of LC/MS MH+: 416.05; 1H NMR (CDCl3): 3.67 (s, 3H), 7.30 (t, 1H), 7.45 (m, 4H), 7.57 (m, 1H), 7.93 (t, 1H), 8.50 (s, 1H), 9.13 (s, 1H).

Provenance & Evidence