Phosphorus oxychloride → HCID 59313005, compound

Participants

Reaction Conditions

Reaction Steps

2300 mg (6.5 mmol) of ethyl 5-hydroxy-7-[4-(trifluoromethyl)phenyl][1,2,4]triazolo-[1,5-c]pyrimidine-2-carboxylate (Example 133A) are introduced into phosphoryl chloride (30 ml), 5.95 g (26.1 mmol) of benzyltriethylammonium chloride are added, and the reaction mixture is stirred at 120° C. for 20 h. The reaction mixture is slowly poured, while stirring vigorously, into saturated sodium bicarbonate solution (200 ml) and ice, and solid sodium bicarbonate (approx. 20 g) is added until a pH of 8 is reached. The solid is filtered off with suction and washed with water and diethyl ether and dried. 2300 mg (92% of theory) of the product are obtained.

Provenance & Evidence