Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 8 (August 2013)


organic compounds



lh5628 scheme

Acta Cryst. (2013). E69, o1262    [ doi:10.1107/S1600536813019132 ]

Methyl 5-(4-acetoxyphenyl)-2-(2-bromobenzylidine)-7-methyl-3-oxo-2,3-dihydro-5H-1,3-thiazolo[3,2-a]pyrimidine-6-carboxylate

N. Fathima, H. Nagarajaiah and N. S. Begum

Abstract: In the title molecule, C24H19BrN2O5S, the pyrimidine ring is in a flattened half-chair conformation and the 4-acetoxyphenyl group is substituted axially to this ring. The thiazole ring is essentially planar [with a maximum deviation of 0.012 (2) Å for the N atom] and forms dihedral angles of 17.65 (13) and 88.95 (11)° with the bromo- and acetoxy-substituted benzene rings, respectively. The dihedral angle between the benzene rings is 81.84 (13) Å. In the crystal, pairs of weak C-H...O hydrogen bonds lead to the formation of inversion dimers. A weak C-H...[pi] interaction and [pi]-[pi] stacking interactions with centroid-centroid distances of 3.5903 (14) Å are observed.


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