Ammonia → 6,8-Difluoro-3-methylisoquinoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 2,4-difluoro-6-prop-1-ynylbenzaldehyde (Description 71, 8.7 g; 48.8 mmol) and 2.0M ammonia in methanol (244 ml; 488 mmol) were heated together at 80° C. in a Parr apparatus (approx 35 psi achieved) for 5 hours. The cooled mixture was evaporated and the residue purified by column chromatography on silica-elution with 100% dichloromethane to give the title compound (5.2 g, 59%) as a brown solid.

Provenance & Evidence