Diisopropylamine → HCID 58566382, compound

To a solution of diisopropylamine (0.841 mL, 6.0 mmol) in tetrahydrofuran (15 mL) at −78° C. under nitrogen was added slowly the solution of n-butyllithium (3.75 mL, 6.0 mmol, 1.6M in hexanes). After stifling for 30 minutes, the solution of TMS-diazomethane (3.0 mL, 6.0 mmol, 2M in hexanes) was added slowly into the reaction mixture. The mixture was stirred for 30 minutes then was added the solution of 3-fluoro-4-methoxy-2-propylbenzaldehyde (597) (0.589 g, 3.0 mmol) in tetrahydrofuran (3 mL). The resulting mixture was stirred at room temperature for 12 hours, quenched with saturated ammonium chloride and extracted with ethyl ether. The organic phase was washed with water, brine, dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (10% EtOAc in hexanes) to provide 1-ethynyl-3-fluoro-4-methoxy-2-propylbenzene (626) (0.180 g, 31.2%) as a colorless oil.

1. stirringThe resulting mixture was stirred at room temperature for 12 hours
2. customquenched with saturated ammonium chloride
3. extractionextracted with ethyl ether
4. washThe organic phase was washed with water, brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by flash chromatography on silica gel (10% EtOAc in hexanes)

ORD record

ord-0c763309f7394ec198a546e00a71114d

Source dataset

uspto-grants-2012_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08309600B2