反应详情

To an ethanolic solution (200 ml) of 4-chloroimidazo [1,5-a]quinoxaline 3-carboxylic acid ethyl ester (4.8 g) was added thiourea (1.5 g). The mixture was heated on steam bath for one hour. After cooling to room temperature, the precipitated product was collected as a yellowish crystalline solid (3.2 g, 67% yield). Recrystallized from methanol-chloroform, m.p. 251°-253° C.

1. temperatureThe mixture was heated on steam bath for one hour