Ethyl 2-(diphenylmethyleneamino)acetate → HCID 67351330, compound

Temperature

0 °C

To a solution of potassium tert-butoxide (25.7 g) in tetrahydrofuran (800 mL) was added N-(diphenylmethylidene)glycine ethyl ester (45.20 g) over 20 min at 0 to 8° C. The reaction mixture was stirred at 0° C. for 30 min, and 4-(iodomethyl)tetrahydro-2H-pyran (42.0 g) was added thereto. The reaction mixture was stirred overnight at room temperature, and the precipitate solid was filtrated. The filtrate was concentrated, the obtained residue was dissolved in ethanol (200 mL), and 2M hydrochloric acid (200 mL) was added thereto. The reaction mixture was stirred overnight at room temperature, and concentrated. The residue was diluted with water, and the mixture was washed with ethyl acetate (×4). The aqueous layer was adjusted to pH 11 with 8M aqueous sodium hydroxide solution, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4), and concentrated to give the title compound (23.00 g, yield 67%) as a yellow oil.

1. stirringThe reaction mixture was stirred overnight at room temperature
2. filtrationthe precipitate solid was filtrated
3. concentrationThe filtrate was concentrated
4. dissolutionthe obtained residue was dissolved in ethanol (200 mL)
5. addition2M hydrochloric acid (200 mL) was added
6. stirringThe reaction mixture was stirred overnight at room temperature
7. concentrationconcentrated
8. additionThe residue was diluted with water
9. washthe mixture was washed with ethyl acetate (×4)
10. extractionthe mixture was extracted with ethyl acetate
11. washThe ethyl acetate layer was washed with saturated brine
12. dry with materialdried (MgSO4)
13. concentrationconcentrated

ORD record

ord-1ee197d8836543968080546217be59ae

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08349886B2