Pyridine → HCID 86636434, compound

Temperature

55 °C

To a solution of 6-chloro-2-cyclopentyloxy-nicotinamide (1.56 g, 6.48 mmol) and pyridine (3.14 mL, 38.88 mmol) in acetonitrile (30 mL), phosphorus oxychloride (1.77 mL, 19.44 mmol) was added over a period of 5 min. The reaction was stirred at 55° C. for 1 h. Acetonitrile was evaporated in vacuo and the resulting residue was then neutralized with 1N NaOH at 0° C. until pH reached to −7. The reaction mixture was extracted with EtOAc (100 mL). The organic layer was collected and the aqueous was further extracted with EtOAc (3×50 mL). All organics were combined washed with brine (2×25 mL), dried over anhyd. Na2SO4, filtered, and concentrated to give the title compound (1.63 g, 94%) as yellow oil, which was carried forward without further purification. 1H NMR (400 MHz, DMSO-d6) δ 8.26 (d, J=7.8 Hz, 1H), 7.26 (d, J=7.8 Hz, 1H), 5.49-5.42 (m, 1H), 2.25-1.78 (m, 2H), 1.80-1.64 (m, 4H), 1.60 (t, J=6.8 Hz, 2H).

1. customAcetonitrile was evaporated in vacuo
2. customwas then neutralized with 1N NaOH at 0° C. until pH
3. extractionThe reaction mixture was extracted with EtOAc (100 mL)
4. customThe organic layer was collected
5. extractionthe aqueous was further extracted with EtOAc (3×50 mL)
6. washAll organics were combined washed with brine (2×25 mL)
7. customdried over anhyd
8. filtrationNa2SO4, filtered
9. concentrationconcentrated

ORD record

ord-df05a6daa2a14243b8b2e3edcb72bcee

Source dataset

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09416146B2