Trimethylsilylacetylene → 6-Fluoronaphthalen-2-ol

Participants

Reaction Conditions

Reaction Steps

A solution of 2-(4-fluorophenyl)acetyl chloride (5.0g; 29 mmol) in CH2Cl2 was added to AlCl3 (7.73g;58 mmol) in CH2Cl2 at −20° C. over 30 min. Trimethylsilyl acetylene (9.96g; 101.43 mmol) was added also over 30 min and stirred at −10° C. for 1h. The mixture was poured in ice and extracted with EtOAc. The organic phase was washed with water, NaHCO3 and brine. After purification by gel silica chromatography (10% EtOAc in hexane) 2.43 g (36%) of 3-(trimethylsilyl)-6-chloro-2-naphthol was collected. The desylilation was done with TFA in CH2Cl2 at rt overnight. Purification by gel silica chromatography (10% EtOAc in hexane) afforded the title compound in 69% yield.

Provenance & Evidence