Isopropylamine → HCID 86662609, compound

Temperature

10 °C

n-Butyllithium (24.2 mL, 60 mmol, 2.5 M solution in hexanes) was added to a solution of iso-propylamine (8.1 mL, 58 mmol) in dry ether (70 mL) under nitrogen at a rate needed to maintain temperature below −60° C. Upon completion, the reaction was allowed to warm to 10° C., re-cooled to −78° C. before addition of ethyl 2-cyanopropanoate (7 g, 55 mmol). After stirring at −78° C. for 90 minutes, chloromethylsulfide (4.61 mL, 55 mmol) was added and the mixture was warmed to room temperature over 14 hours, diluted with ether (350 mL), washed with water (100 mL), brine (100 mL), dried over MgSO4, concentrated under reduced pressure and distilled at 0.04 mm Hg. Yield of yellow liquid 3.95 g. (38%): bp 145° C.; IR (KBr thin film) 1751 cm−1; 1H NMR (400 MHz, CDCl3) δ 4.30 (q, J=7.1 Hz, 2H), 3.08 (d, J=13.9 Hz, 1H), 2.91 (d, J=13.9 Hz, 1H), 2.30 (s, 3H), 1.67 (s, 3H), 1.35 (t, J=7.4 Hz, 3H); ESIMS m/z 187.

1. temperatureto maintain temperature below −60° C
2. temperaturethe mixture was warmed to room temperature over 14 hours
3. washwashed with water (100 mL), brine (100 mL)
4. dry with materialdried over MgSO4
5. concentrationconcentrated under reduced pressure
6. distillationdistilled at 0.04 mm Hg

ORD record

ord-4c3debcac00742a2aa46ffd7d356236b

Source dataset

uspto-grants-2013_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08604211B2