Methyl Isocyanate → (1-{1-[6-(3,4-Difluoro-phenoxy)-4-methylcarbamoyl-hexahydro-pyrrolo[3,2-b]pyrrole-1-carbonyl]-2,2-dimethyl-propylcarbamoyl}-ethyl)-methyl-carbamic acid benzyl ester

Participants

Reaction Conditions

Reaction Steps

A solution containing 35 (228 mg, 0.4 mmol), DIPEA (104 mg, 0.8 mmol) in DCM (5 mL) was cooled to 0° C. Methyl isocyanate (35 mg, 0.6 mmol) was added. After 3 h, the reaction mixture was warmed to ambient temperature, diluted with DCM, washed successively with saturated aqueous NaHCO3, 1N HCl, and brine, dried over anhydrous Na2SO4, filtered, and concentrated to afford the crude 40 (230 mg) which was used without further purification. Mass spectrum, m/z [630.1] (M+H)+.

Provenance & Evidence