Acetic Acid → HCID 53730400, compound

Diethyl oxalate (1.94 g, 13.2 mmol) and then a solution of 2-methyl-4-[N-methyl-N-[2-(2-tetrahydro-2H-pyranyl)oxyethyl]amino]-3-nitrobenzotrifluoride (2.40 g, 6.62 mmol) in tetrahydrofuran (40 ml) were added dropwise to a mixture of potassium ethoxide (1.11 g, 13.2 mmol) and tetrahydrofuran (60 ml) at room temperature. The reaction mixture was stirred at room temperature for 6 hours and then cooled to 3° C., and acetic acid (1.59 g, 26.5 mmol) was added dropwise. The reaction mixture thus obtained was poured into cold water and extracted twice with ethyl acetate. The extract solution was washed with a 5% aqueous sodium chloride solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was purified by a silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/9) to obtain an oil of ethyl [3-[N-methyl-N-[2-(2-tetrahydro-2H-pyranyl)oxyethyl]amino]-2-nitro-6-trifluoromethylphenyl]pyruvate.

1. temperaturecooled to 3° C.
2. customThe reaction mixture thus obtained
3. extractionextracted twice with ethyl acetate
4. washThe extract solution was washed with a 5% aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. distillationThe solvent was distilled off under reduced pressure
7. customthe resulting residue was purified by a silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/9)

ORD record

ord-b53fc2921f9142578af37e1dc3f7059b

Source dataset

uspto-grants-2001_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06271251B1