1,1-Dichloroethane → 6-Fluoro-1,2,3,4-tetrahydronaphthalen-2-one

Participants

Reaction Conditions

Reaction Steps

4-fluorophenylacetic acid (1 equivalent) was dissolved in dichloroethane (1.3 M) containing SOCl2 (3 equivalents), the mixture was refluxed for 90 minutes and the solvent was removed. Solution of this crude product in CH2Cl2 was added dropwise within 60 minutes to AICl3 (2 eq) in CH2Cl2 (0.4 M) while stirring at 0° C. Thereafter, ethylene was introduced at 0° C. over 45 minutes, whereupon the mixture was stirred further at room temperature for 1 hour, and thereafter was treated at 0° C. with ice-water. The organic phase was washed with 1N HCl (2×), NaHCO3 (sat. sol.), dried and evaporated. The residue was triturated with hexane, yielding the product as a bright yellow solid.

Provenance & Evidence