1-Hydroxybenzotriazole → HCID 10303235, compound

Participants

Reaction Steps

10-(5-Chloro-4-cyclohex-1-en-1-yl-2-methoxybenzoyl)-10,11-dihydro-5H-pyrrolo [2,1-c][1,4]benzodiazepine-3-carboxylic acid of Example 1, Step G (0.370 g, 0.776 mmol), 3-methylamino-1,2-propanediol (0.098 g, 0.931 mmol), 1-hydroxy benzotriazole (0.115 g, 0.854 mmol) and 1-[3-dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (0.164 g, 0.854 mmol) were combined in amine-free N,N-dimethylformamide (3.9 mL), followed by addition of N,N-diisopropylethylamine (0.202 mL, 1.16 mmol). The reaction was stirred at room temperature for 12 hours, then diluted with ethyl acetate and washed with 1 N hydrochloric acid, 1 N sodium hydeoxide and brine. The combined aqueous washings were saturated with sodium chloride and extracted with ethyl acetate. The combined organic phases were dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by flash column chromatography on silica gel eluting with a solvent gradient from 0 to 5% of methanol in chloroform, to afford 0.400 g of the title compound as a white, crystalline solid, m.p.155-157° C.

Provenance & Evidence