Phenylphosphonic dichloride → 4-Chloro-6-(trifluoromethyl)pyrimidine

Participants

Reaction Steps

Phenylphosphonic dichloride (107 ml) and 4-trifluoromethylpyrimidin-6-one (103 g) were heated at 130° C. under nitrogen for 30 minutes. The reaction was cooled to room temperature and the reaction flask was equipped with a short path distillation head. The bath temperature was raised to about 200° C. and the product distilled out of the reaction mixture. Fractional distillation of this material gave 80.8 g of 4-chloro-6-trifluoromethylpyrimidine as a colorless liquid (b.p.=134°-136° C. @ 760 mm Hg).

Provenance & Evidence