No abstract

The title compound, C10H11NOS2, crystallizes with Z' = 2 in space group C2/c. The molecules are linked by two N-H...S hydrogen bonds [H...S = 2.60 and 2.62 A, N...S = 3.350 (2) and 3.490 (2) A, and N-H...S = 143 and 172 degrees] into two distinct types of R(2)2(8) dimer, viz. one generated by inversion and the other by a twofold rotation axis. A single C-H...pi(arene) hydrogen bond links the two types of dimer into chains.

Molecules of the title compound, C10H10ClNOS2, are linked into C4 chains by an N-H...O hydrogen bond [H...O = 2.16 A, N...O = 3.013 (3) A and N-H...O = 176 degrees ], and the chains are linked into sheets by a centrosymmetric pi-pi stacking interaction.

Regioselective Synthesis of Novel 4-Aryl-2-ethylthio-7-methyl Pyrazolo[1,5-a]-[1,3,5]-triazines. -The title compounds (III) represent purine analogues and are of biological interest. They can be synthesized either directly starting from the dithiocarbonates (I) or by a two-step sequence starting from isothiocyanates (IV) which includes the thiourea derivatives (V). Their reaction with EtBr in DMF at room temperature proceeds via intermediates of type (VII). -(INSUASTY*, H.; ESTRADA, M.; CORTES, E.; QUIROGA, J.; INSUASTY, B.; ABONIA, R.; NOGUERAS, M.; COBO, J.; Tetrahedron Lett. 47 (2006) 31, 5441-5443; Dep. Quim., Univ. Narino, Pasto, Colombia; Eng.) -S. Adam 46-205