Bromine → 2-(2-chlorophenylsulfonyl)imino-5-methoxy-7-methyl-2H-[1,2,4]-thiadiazolo [2,3-a]pyrimidine

関与物質

反応手順

A solution of 2.0 g of N-(2-chlorophenylsulfonyl)-N'-(4-methoxy-6-methyl-2-pyrimidinyl) thiourea in 30 ml of pyridine is cooled to -6° C.~-8° C., to which 0.9 g of bromine is dropwise added. After stirring for 1.5 hours, at the same temperature, the reaction mixture is poured into 150 ml of ice water and the precipitate is collected by filtration. It is then washed with water, dried, and recrystallized from acetonitrile to give 1.4 g of title compound as white needles. mp 191°~192° C. (decomp.)

情報源と証拠