Hydrochloric Acid → HCID 178453517, compound

Participants

Reaction Steps

To a solution of ethyl 2-[4-[tert-butoxycarbonyl-[3-(tert-butoxycarbonylamino)propyl]amino]cyclohexyl]acetate (1.53 g, 3.47 mmol) in methanol (3 mL) and THF (3 mL) was added NaOH (7.5 mL, 1M aqueous). The resulting solution was stirred for 2.75 hours the acidified with HCl (8 mL, 1M aqueous). This mixture was extracted with ethyl acetate, washed with brine dried over magnesium sulfate and concentrated. The residue was taken up in ether (5 mL). To this solution was added (−) α-methyl-benzylamine (428 μL, 347 mmol) and the resulting solution allowed to stand overnight. The crystalline mass was filtered, washed with ether and the collected solid recrystallized from isopropanol/ether to give 1.1 g of solid. The material was suspended in ethyl acetate, washed with 1M HCl aqueous, followed by brine, dried over magnesium sulfate and concentrated to give the title compound.

Provenance & Evidence