Potassium Carbonate → (2S,3'S)-2-Methyl-1'-(6-nitro-pyridin-3-yl)-[1,3']bipyrrolidinyl

Temperature

65 °C

To a solution of (2S,3′S)-2-methyl-[1,3′]bipyrrolidinyl dihydrochloride (0.530 g, 2.35 mmol,) in acetonitrile (25 mL) was added 5-chloro-2-nitro-pyridine (0.561 g, 3.53 mmol,) and powdered potassium carbonate (1.30 g, 9.40 mmol). The reaction mixture was then heated to 65° C. for 4.0 hr, then at 45° C. for 16 hr. The reaction mixture was then allowed to cool to room temperature and filtered through a 10.0 g Varian Bond Elut SCX (stong cation-exchange) cartridge eluting with 50 mL of (1:1) methanol in dichloromethane, 25 mL of methanol, followed by 7N ammonia in methanol (50 mL). The filtrate was concentrated under vacuum to obtain a compound which was purified again by column chromatography on silica gel eluting with methanol in dichloromethane (0-10%) to afford 0.110 g (17%) of the title compound.

1. temperatureto cool to room temperature
2. filtrationfiltered through a 10.0 g Varian Bond Elut SCX (stong cation-exchange) cartridge
3. washeluting with 50 mL of (1:1) methanol in dichloromethane, 25 mL of methanol
4. concentrationThe filtrate was concentrated under vacuum
5. customto obtain a compound which
6. customwas purified again by column chromatography on silica gel eluting with methanol in dichloromethane (0-10%)

ORD record

ord-a05d7d5d81894767ba042ba9fb2e5816

Source dataset

uspto-grants-2014_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08859588B2