Dichloromethane methanol → 8-Fluoroisochroman-4-one

Participants

Reaction Conditions

Reaction Steps

8-Fluoro-4-methylene-3,4-dihydro-1H-isochromene (400 mg) was dissolved in a solution of 1:1 MeOH/DCM (50 mL) and 1 mL of pyridine added. The mixture was chilled to −78° C. and ozone was bubbled through the mixture for 40 min. The reaction monitored by TLC. The mixture was purged with nitrogen at −78° C. for 10 min and then treated with PPh3. After concentration, the resulting residue was purified by preparative TLC to offer 300 mg of the title compound.

Provenance & Evidence