Ethyl bromoacetate → [3',5'-Dichloro-4'-(1-cyclohexyl-2-oxo-pyrrolidin-3-ylmethyl)-biphenyl-4-yloxy]-acetic acid ethyl ester

Participants

Reaction Steps

Combine 1-cyclohexyl-3-(3,5-dichloro-4′-hydroxy-biphenyl-4-ylmethyl)-pyrrolidin-2-one (Preparation 52) (0.15 g, 0.36 mmol), ethyl bromoacetate (0.12 g, 0.718 mmol) and Cs2CO 3 (0.29 g, 0.89 mmol) in DMF (6 mL) and heat to 60° C. for 16 hours. Cool the reaction, extract with diethyl ether and water, dry the organic layer (Na2SO4) and then purify by normal phase chromatography (30 to 80% gradient of ethyl acetate in hexanes) to afford 159 mg (88%) of the title compound: LC-MS (ES+) m/z=exact mass calcd for C27H31Cl2NO4 503, found 504 and 506 (M+1 and M+3, 100%).

Provenance & Evidence