Valeryl chloride → HCID 54276530, compound

Temperature

-78 °C

A solution of ethyl 4-acetylbenzoate (2.93 g, 15.3 mmol) in 25 mL ether was added to a solution of lithium diisopropylamide (0.805 M in THF-hexane, 20.85 mL, 16.79 mmol) in 200 mL of ether at −70° C. The mixture was stirred at −78° C. for 30 minutes, magnesium bromide etherate (3.94 g, 15.26 mmol) was added and the reaction mixture was stirred for 30 minutes followed by the addition of valeryl chloride (1.47 g, 12.2 mmol) in 3 mL ether. Stirring was continued at −78° C. for an additional 30 minutes. The mixture was allowed to come to room temperature, quenched by adding saturated ammonium chloride and acidified (pH=3.0) by adding 20% sulfuric acid. The mixture was extracted with ethyl acetate, the organic layer was dried over magnesium sulfate, concentrated, and the residue subjected to flash chromatography (silica gel/hexane-ethyl acetate 95:5) to afford the title compound (1.35 g).

1. stirringthe reaction mixture was stirred for 30 minutes
2. stirringStirring
3. waitwas continued at −78° C. for an additional 30 minutes
4. customto come to room temperature
5. customquenched
6. additionby adding saturated ammonium chloride
7. additionby adding 20% sulfuric acid
8. extractionThe mixture was extracted with ethyl acetate
9. dry with materialthe organic layer was dried over magnesium sulfate
10. concentrationconcentrated

ORD record

ord-e00d45f675b147c0b1594aeedcf91e1f

Source dataset

uspto-grants-2003_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06624309B1