Thiourea → HCID 178470272, compound

Participants

Reaction Steps

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.

Provenance & Evidence