Triethylamine → 3-((3R,4R)-4-(4-(benzyloxy)phenyl)-3-hydroxypiperidin-1-yl)-1-(4-methylbenzyl)pyrrolidin-2-one

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Reaction Conditions

Reaction Steps

A mixture of 3-bromo-1-(4-methylbenzyl)pyrrolidin-2-one (Intermediate 2, 220 mg, 0.82 mmol), (3R,4R)-4-(4-(benzyloxy)phenyl)piperidin-3-ol hydrochloride (262 mg, 0.82 mmol, from step G) and triethylamine (11 mL, 8.2 mmol) was stirred at 60° C. for 1 h, 80° C. for 1 h, 100° C. for 1 h and 120° C. for 1 h. The reaction mixture was then allowed to cool, diluted with 40 mL of water and extracted four times with 50 mL of chloroform. The combined organic layers were washed with 60 mL brine, dried over anhydrous sodium sulfate, filtered, and evaporated to yield 382 mg of 3-((3R,4R)-4-(4-(benzyloxy)phenyl)-3-hydroxypiperidin-1-yl)-1-(4-methylbenzyl)pyrrolidin-2-one which was used without further purification. LCMS (method J) (main component of a mixture) RT 2.23 min, m/z 471 (M+H+).

Provenance & Evidence