3-Butyl-2-morpholino-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one

Abstract

In the title mol­ecule, C18H25N3O2S, the central thieno­pyrimidine ring system is essentially planar. The cyclo­hexene ring, in which the four CH2 groups are disordered in an approximately 1:1 ratio, adopts a half-chair conformation, while the morpholine ring is in a standard chair conformation. The butyl group is disordered in an approximately 2:1 ratio. In the crystal structure, weak inter­molecular C—H⋯O hydrogen-bonding inter­actions stabilize the crystal structure.