Hydrochloric Acid → HCID 68518842, compound

Temperature

-78 °C

To a stirred solution of potassium tert-butoxide (0.84 g, 7.5 mmol) in dry THF (5.25 mL) under an N2 atmosphere at −78° C. was added a cooled (−78° C.) solution of N-(diphenylmethylene)glycine ethyl ester (2.00 g, 7.5 mmol) in dry THF (3 mL), dropwise. The resulting solution was stirred at −78° C. for 30 minutes when it was added via canula to a stirred solution of 2-thiophene carbonyl chloride (0.80 mL, 7.5 mmol) in dry THF (3 mL) under an N2 atmosphere at −78° C. The resulting mixture was stirred at −78° C. for 1 hour. The reaction was warmed to room temperature, 3N aqueous HCl (7.5 mL) was then added and the mixture stirred for 15 minutes. The resulting mixture was then concentrated in vacuo, diluted with water and washed with Et2O. The aqueous phase was evaporated to dryness to afford ethyl 2-amino-3-oxo-3-(thiophen-2-yl)propanoate hydrochloride (1.345 g) as a pale solid which was used without further purification. LCMS (2) Rt: 1.44 min; m/z (ES+) 214.

1. stirringThe resulting mixture was stirred at −78° C. for 1 hour
2. temperatureThe reaction was warmed to room temperature
3. stirringthe mixture stirred for 15 minutes
4. concentrationThe resulting mixture was then concentrated in vacuo
5. additiondiluted with water
6. washwashed with Et2O
7. customThe aqueous phase was evaporated to dryness

ORD record

ord-310e2da6c33145b091ba3bd75f197ac5

Source dataset

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09187465B2