Water → HCID 67350136, compound

Participants

Reaction Steps

(S)-3-(9-Methylthio-6-oxo-2,3,3a,4-tetrahydro-1H,6H-5,8,10,10b-tetraazabenzo[e]azulen-5-yl)benzoic acid (1.36 g, 3.68 mmol) obtained in Step 1 was dissolved in dichloromethane (18 mL), and the mixture was stirred at room temperature for 1 hour after adding 1,1′-carbonyldiimidazole (657 mg, 4.05 mmol). Thereafter, hydrazine.monohydrate (0.53 mL, 11.0 mmol) was added to the mixture, and the mixture was stirred at room temperature for 1 hour. Then, water was added to the mixture, stirred, and the precipitated solid was filtered off. After concentrating the filtrate under reduced pressure, the residue was recrystallized from dichloromethane and water to give (S)-3-(9-methylthio-6-oxo-2,3,3a,4-tetrahydro-1H,6H-5,8,10,10b-tetraazabenzo[e]azulen-5-yl)benzoic hydrazide (1.21 g, 86%).

Provenance & Evidence