Water → HCID 54279304, compound

Temperature

0 °C

A suspension of 3-picolylchloride hydrochloride (1.84 g, 11.2 mmol) in DMF (50 ml) was added to a stirred slurry of sodium hydride (60% dispersion in oil, 0.45 g, 11.2 mmol) in DMF at 0° C. under nitrogen. The mixture was stirred at 0° C. for 0.25 h and then added to a mixture of (3R)-N-tert-butyloxycarbonylpyrrolidin-3-ol (2.0 g, 10.7 mmol) and sodium hydride (60% dispersion in oil, 0.45 g, 11.2 mmol) in DMF at 0° C. under nitrogen (mixture stirred for 0.2 h at 0° C. prior to the addition). The reaction mixture was stirred at room temperature for 2.5 h. Water (200 ml) was added and the mixture extracted with ethyl acetate (1×200 ml), dried (Na2SO4) and evaporated in vacuo. The crude product was chromatographed on silica gel, eluting with Et2 O/MeOH (95:5), to give the desired product (1.63 g, 55%), δ (250 MHz, d4 -MeOH), 1.46 (9H, s, OC(Me)3), 1.95-2.18 (2H, m, CH2), 3.34-3.51 (4H, m, 2 of CH2), 4.22 (1H, m, CHOCH2Ar), 4.59 (2H, s, OCH2Ar), 7.43 (1H, dd, J=4.7 and 7.8 Hz, Ar--H), 7.48 (1H, d, J=7.9 Hz, Ar--H), 8.45-8.51 (2H, m, 2 of Ar--H).

1. stirringstirred for 0.2 h at 0° C.
2. additionto the addition)
3. stirringThe reaction mixture was stirred at room temperature for 2.5 h
4. extractionthe mixture extracted with ethyl acetate (1×200 ml)
5. dry with materialdried (Na2SO4)
6. customevaporated in vacuo
7. customThe crude product was chromatographed on silica gel
8. washeluting with Et2 O/MeOH (95:5)

ORD record

ord-2b2ba448d8f3485081529fc1aa291777

Source dataset

uspto-grants-1998_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05854268