Cesium carbonate → (3R,3'R)-1'-(5-Bromo-pyridin-2-yl)-3-fluoro-[1,3']bipyrrolidinyl

Participants

Reaction Conditions

Reaction Steps

Dissolve methanesulfonic acid (S)-1-(5-bromo-pyridin-2-yl)-pyrrolidin-3-yl ester (3 g, 9.34 mmol) and (R)-3-fluoro-pyrrolidine hydrochloride (1.00 g, 11.21 mmol) in DMF (50 mL) and add Cs2CO3 (9.13 g, 28.02 mmol). Warm to 70° C. overnight. Dilute with dichloromethane (3×40 mL), wash with H2O (50 mL) and brine. Dry with Na2SO4, filter, and concentrate the organic solution. Purify the crude material by chromatography, eluting with 0-50% EtOAc/hexane, to give 1.14 g (39%) of (3R,3′R)-1′-(5-Bromo-pyridin-2-yl)-3-fluoro-[1,3′]bipyrrolidinyl.

Provenance & Evidence