4,4,6-Tri­methyl-1-phenyl-3,4-di­hydro­pyrimidine-2(1H)-thione

The reaction of cinnamoyl iso­thio­cyanate and aniline gave a the title cyclized thio­urea, C₁₃H₁₆N₂S. There are two mol­ecules in the asymmetric unit. The pyrimidine-2-thione moiety in each mol­ecule is almost perpendicular to the phenyl group. The mol­ecules are linked by two intermolecular N—H...S hydrogen bonds to form a dimer.

5-Acetyl-4-methyl-2-(2-fluoro­phenyl­amino)-1,3-thia­zole

The mol­ecule of the title compound, C₁₂H₁₁N₂FOS, is essentially planar, with a maximum deviation of 0.127 (3) Å for the C atom of the methyl group attached to the thia­zole ring. The structure is stabilized by intra- and inter­molecular hydrogen bonds to form one-dimensional polymeric chains parallel to the b axis.

5-Acetyl-4-methyl-2-phenyl­amino-1,3-thia­zole

The asymmetric unit of the title compound, C₁₂H₁₂N₂OS, contains two crystallographically independent mol­ecules. Both mol­ecules are essentially planar and stabilized by intra- and inter­molecular hydrogen-bonding inter­actions to form one-dimensional zigzag polymeric chains parallel to the c axis.