1-Hydroxybenzotriazole → HCID 9829761, 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 Step G (0.125 g, 0.262 mmol), 3-(methylaminomethyl)pyridine (0.038 g, 0.314 mmol), 1-hydroxy benzotriazole (0.039 g, 0.288 mmol) and 1-[(3-dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (0.055 g, 0.288 mmol) were combined in amine-free N,N-dimethylformamide (1.1 mL), followed by addition of N,N-diisopropylethyl amine (0.068 mL, 0.393 mmol). The reaction was stirred at room temperature for 16 hours, then diluted with ethyl acetate and washed with water, saturated aqueous sodium bicarbonate 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 5% methanol in chloroform, and recrystallized from diethyl ether/pentane to afford 0.140 g of the title compound as a white crystalline solid, m.p. 178-179° C., 98.0% pure by analytical HPLC (Primesphere C-18, 2.0×150 mm, 45% acetonitrile/water, 0.2 mL/min.).

Provenance & Evidence