title: 3-Isopropyl-2-p-tol-yloxy-5,6,7,8-tetra-hydro-1-benzothieno[2,3-d]pyrimidin-4(3H)-one.
abstract: In the title compound, C(20)H(22)N(2)O(2)S, the central thieno-pyrimidine ring system is essentially planar, with a maximum displacement of 0.023 (2) Å. The attached cyclo-hexene ring is disordered over two possible conformations, with an occupancy ratio of 0.776 (12):0.224 (12). Neither inter-molecular hydrogen-bonding inter-actions nor π-π stacking inter-actions are present in the crystal structure. The mol-ecular conformation and crystal packing are stabilized by three intra-molecular C-H⋯O hydrogen bonds and two C-H⋯π inter-actions.
authors.forename: Xiao-Hua
authors.initials: XH
authors.lastname: Zeng
authors.forename: Shou-Heng
authors.initials: SH
authors.lastname: Deng
authors.forename: Yong-Nian
authors.initials: YN
authors.lastname: Qu
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Wang