3,4-Dimethoxybenzeneacetonitrile → 2-[3,4-Bis(methyloxy)phenyl]-3-oxo-4-(2-oxopyrrolidin-1-yl)butanenitrile

To a mixture of [3,4-bis(methyloxy)phenyl]acetonitrile (1.0 g, 5.5 mmol) and methyl (2-oxopyrrolidin-1-yl)acetate (1.0 g, 7.0 mmol) in ethanol (4 mL) was added a sodium ethoxide solution (21%, 4.2 mL, 11 mmol), and the resulting mixture was heated at reflux for 18 hours. After cooling to room temperature, it was poured into a mixture of ice-water (50 mL). This aqueous mixture was washed with dichloromethane (3×20 mL) then acidified to pH 1. The acidified mixture was extracted with ethyl acetate (3×30 mL). The combined extract was washed with aqueous sodium bicarbonate solution, brine, dried over sodium sulfate, filtered and concentrated to give 2-[3,4-bis(methyloxy)phenyl]-3-oxo-4-(2-oxopyrrolidin-1-yl)butanenitrile as a brown oil (0.43 g, 1.4 mmol, 25% yield), MS (EI) for C16H18N2O4: 303 (MH+).

1. temperaturethe resulting mixture was heated
2. temperatureat reflux for 18 hours
3. washThis aqueous mixture was washed with dichloromethane (3×20 mL)
4. extractionThe acidified mixture was extracted with ethyl acetate (3×30 mL)
5. extractionThe combined extract
6. washwas washed with aqueous sodium bicarbonate solution, brine
7. dry with materialdried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated

ORDレコード

ord-808e0f393b3a4a628f7f087ed182a181

出典データセット

uspto-grants-2011_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07872014B2