Sodium Chloride → HCID 18950748, compound

Diisopropylamine (2.8 g) in 50 ml of tetrahydrofuran in solution was cooled to -35 to -40° C., followed by addition of 1.5M n-butyllithium in 118 ml of hexane in solution, and stirred for 30 minutes to produce lithium diisopropylamide. To the solution was added a solution of 4.7 g of 2-(3-pyridyl)-2-(trimethylsiloxy) acetonitrile in dry tetrahydrofuran at -78° C., and stirred at the same temperature for 30 minutes, followed by addition of a solution of 5.3 g of methyl 4-bromomethylphenylacetate in dry tetrahydrofuran at -78° C., and stirred overnight from -78° C. to room temperature. To the reaction mixture was added 1.0M tetra-n-butylammonium fluoride in dry tetrahydrofuran (23 ml) in solution, and stirred at room temperature for four hours. The reaction solution was poured into saturated aqueous sodium chloride solution, followed by the separation of the organic phase. The aqueous phase was extracted with ethyl acetate subsequently. The organic phase was washed in saturated aqueous sodium chloride solution and dried over magnesium sulfate, to distill off the solvent. The residue was subjected to chromatography on a silica gel column, which was then eluted with chloroform to produce 2.3 g of methyl 4-[2-oxo-2-(3-pyridyl)ethyl]phenylacetate.

1. stirringstirred overnight from -78° C. to room temperature
2. stirringstirred at room temperature for four hours
3. customfollowed by the separation of the organic phase
4. extractionThe aqueous phase was extracted with ethyl acetate subsequently
5. washThe organic phase was washed in saturated aqueous sodium chloride solution
6. dry with materialdried over magnesium sulfate
7. distillationto distill off the solvent
8. washwas then eluted with chloroform

ORD record

ord-27527fbc522f43a8b5d59474b2b14d09

Source dataset

uspto-grants-1994_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05374641