title: Methyl (2Z)-2-(2-fluoro-4-meth-oxy-benzyl-idene)-5-(4-meth-oxy-phen-yl)-7-methyl-3-oxo-2,3-dihydro-5H-[1,3]thia-zolo[3,2-a]pyrimidine-6-carboxyl-ate.
abstract: The asymmetric unit of the title compound, C(24)H(21)FN(2)O(5)S, consists of two crystallographically independent mol-ecules. In each mol-ecule, the central dihydro-pyrimidine ring is significantly puckered and adopts a conformation which is best described as an inter-mediate between a boat and a screw boat. The least-squares planes of the dihydro-pyrimidine rings are almost coplanar with the fluoro-substituted benzene rings, making dihedral angles of 9.04 (7) and 6.68 (7)°, and almost perpendicular to the meth-oxy-substituted benzene rings with dihedral angles of 89.23 (7) and 88.30 (7)°. In the mol-ecular structure, S(6) ring motifs are formed by C-H⋯O and C-H⋯S hydrogen bonds. In the crystal, mol-ecules are linked into a three-dimensional network by inter-molecular C-H⋯O and C-H⋯F hydrogen bonds. The crystal structure is further stabilized by a C-H⋯π inter-action.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Wan-Sin
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authors.lastname: Loh
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authors.lastname: Sarojini
authors.forename: K
authors.initials: K
authors.lastname: Umesha
authors.forename: B
authors.initials: B
authors.lastname: Narayana
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