Sulfuric Acid → 2-(Trichloromethyl)-1,3,4-thiadiazole

Participants

Reaction Steps

At 180° to 190° C and over a period of 0.1 hour, a solution of 160.5 parts of 2,5-bis-trichloromethyl-1,3,4-thiadiazole in 200 parts by volume of concentrated H2SO4 is introduced into 100 parts by volume of concentrated H2SO4. The mixture is heated at 170° to 180° C for 0.15 hour, and then poured on to 2,000 parts of ice. The precipitated solid is suction filtered and washed with water. There is obtained 94 parts (92% of theory) of 2-trichloromethyl-1,3,4-thiadiazole; m.p.:57° C.

Provenance & Evidence