Fused polycyclic nitrogen-containing heterocycles: IX. Synthesis and molecular structure of methyl 3-(2-R-5-phenylthiazol-4-yl)-7-phenyl-7H-[1,2,4]triazolo-[3,4-b][1,3,4]thiadiazine-6-carboxylates
作者:V. A. Mamedov、L. V. Mustakimova、A. T. Gubaidullin、I. A. Litvinov、Ya. A. Levin
DOI:10.1007/s11178-005-0012-6
日期:2004.9
4-Amino-3-(2-R-5-phenylthiazol-4-yl)-1,2,4-triazole-5-thiones react with methyl 3-chloro-2-oxo-3-phenylpropionate to give methyl 3-(2-R-5-phenylthiazol-4-yl)-7-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine-6-carboxylates. According to the X-ray diffraction data, the thiazole ring in the products is planar, while the thiadiazine ring has a distorted unsymmetrical boat conformation. Depending on the substituent in the thiazole ring, methyl 3-(2-R-5-phenylthiazol-4-yl)-7-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine-6-carboxylates in crystal give rise to different supramolecular structures, lamellar and cylindrical.
4-氨基-3-(2-R-5-苯基噻唑-4-基)-1,2,4-三唑-5-硫酮与3-氯-2-氧代-3-苯基丙酸甲酯反应得到3- (2-R-5-苯基噻唑-4-基)-7-苯基-7H-[1,2,4]三唑并[3,4-b][1,3,4]噻二嗪-6-羧酸酯。根据X射线衍射数据,产物中的噻唑环是平面的,而噻二嗪环具有扭曲的不对称船形构象。根据噻唑环中的取代基,甲基 3-(2-R-5-苯基噻唑-4-基)-7-苯基-7H-[1,2,4]三唑并[3,4-b][1,晶体中的3,4]噻二嗪-6-羧酸盐产生不同的超分子结构,层状和圆柱形。