Methyl 4-benzoylbenzoate → HCID 54138968, compound

2.97 g (6.93 mmol) of (3-dimethylaminopropyl) triphenylphophonium bromide was dissolved in 25 ml of tetrahydrofuran and 4.77 ml (7.63 mmol) of 1.6 M n-butyl lithium was added dropwise thereto under cooling in a dry ice-acetone bath. The mixture was stirred for 30 minutes under ice-cooling. A solution of 1.67 g (6.93 mmol) of methyl p-benzoylbenzoate in 15 ml of tetrahydrofuran was added thereto and the mixture was stirred for 30 minutes. Returning to room temperature, it was stirred for one hour. After brine was added, the reaction mixture was extracted twice with ethyl acetate, the extract was washed with brine, and dried (Na2SO4). The solvent was distilled off and the residue was purified by silica gel column chromatography (chloroform:methanol=100:1 to 15:1 (v/v)) to obtain 1.59 g (5.14 mmol) of methyl 4-(4-dimethylamino-1-phenyl-1-butenyl)benzoate as a pale brown oily substance. Its spectroscopic data are as follows:

1. temperatureunder cooling in a dry ice-acetone bath
2. temperaturecooling
3. stirringthe mixture was stirred for 30 minutes
4. stirringReturning to room temperature, it was stirred for one hour
5. extractionthe reaction mixture was extracted twice with ethyl acetate
6. washthe extract was washed with brine
7. dry with materialdried (Na2SO4)
8. distillationThe solvent was distilled off
9. customthe residue was purified by silica gel column chromatography (chloroform:methanol=100:1 to 15:1 (v/v))

ORD record

ord-e1bb8276004d4a588e18eaa6dfb79a53

Source dataset

uspto-grants-2000_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06069149