反应详情

Following the method of Gronowitz et al. [Chemica Scripta 15, p. 2 (1980)], 2-chloro-3-bromothiophene is reacted with n-butyl lithium in ether at -70° C. After 15 minutes, the organolithium reagent is poured into a solution of alloxan in tetrahydrofuran at -70° C. The reaction mixture is allowed to warm to room temperature for 2 hours, and 5-(2-chloro-3-thienyl)-2,4,6(1H,3H,5H)-pyrimidinetrione isolated according to Example 5.