Sodium borohydride → 2-(2,5-Difluorophenyl)pyrrolidine

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Reaction Steps

In step 6A-3, sodium borohydride (2.1 g, 55.2 mmol) was added at room temperature to a solution of 5-(2,5-difluorophenyl)-3,4-dihydro-2H-pyrrole (6-4) (5.0 g, 28 mmol) in anhydrous ethanol (150 mL). The reaction mixture was stirred over-night at room temperature. The ethanol was removed using a rotary evaporator and the resulting orange solid was reconstituted with ethyl acetate. The organic layer was washed with brine (3×150 mL), dried with sodium sulfate and the. ethyl acetate was removed to yield 2-(2,5-difluorophenyl)pyrrolidine (6-5) as a light yellow oil. m/z=184.2 [M+1].

Provenance & Evidence