Ethyl Acetate → HCID 131723199, compound

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A solution of methyl 2-UN-methyl-N-((R/S)-α-t-butoxycarbonylmethyl-4-hydroxyphenylacetyl)amino]-(R)-propionate 48d (1.5 g, 4.1 mmol) and 3,5-bistrifluoromethylbenzyl bromide (1.3 g, 4.2 mmol) in DMF (10 mL) was stirred at 60° C. overnight in the presence of K2CO3 (1.14 g, 8 mmol). After cooling to room temperature, EtOAc was added and the solution was washed with brine three times, dried over MgSO4, and concentrated. Purification on a silica gel column by eluting with 40% EtOAc/hexane afforded the product (1.46 g, 60%) as a solid. MS (CI—NH3): (M+H)+=592.

Provenance & Evidence