Ethyl Acetate → HCID 67384774, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of piperidine-1,4-dicarboxylic acid 4-benzyl ester 1-tert-butyl ester (30.12 mmol; 9.62 g) in dry THF (100 mL) under argon at −78° C. was added, dropwise, a 2M solution of lithium diisopropylamide (2M solution in heptanes/THF/ethylbenzene; 39.16 mmol; 19.58 mL). The resulting solution was stirred at −78° C. for 2 hours. 4-Bromomethylbenzoic acid methyl ester (30.12 mmol; 6.90 g) was added and the resulting solution was stirred at −78° C. for 2 hours and allowed to warm to room temperature overnight. Ethyl acetate (150 ml) was added. The resulting solution was washed with a 1M aqueous hydrochloric acid solution (2×50 mL) and brine (50 mL) and dried over magnesium sulfate. After filtration and evaporation, the residue was purified via flash column chromatography (eluent gradient: 0 to 50% EtOAc in heptane) to yield 4-(4-methoxycarbonyl-benzyl)-piperidine-1,4-dicarboxylic acid 4-benzyl ester 1-tert-butyl ester. MS (ESI) m/z 468.20 [M+H]+.

Provenance & Evidence