Synthesis, biological activity and crystal structure of ethyl 6-amino-8-(4-methoxy phenyl)-9-nitro-2,3,4,8-tetrahydropyrido[2,1b][1,3]thiazine-7-carboxylate
作者:Dongmei Li、Zhongzhen Tian、Gaolei Wang
DOI:10.1007/s11164-012-0769-5
日期:2013.7
The compound ethyl 6-amino-8-(4-methoxy phenyl)-9-nitro-2,3,4,8-tetrahydropyrido[2,1b][1,3]thiazine-7-carboxylate (C14H22N4O4S2) has been synthesized by multicomponent reactions, and characterized by 1H NMR, IR, and X-ray diffraction. The crystal structure analysis shows that the thiazinane ring displays a half-chair conformation. The benzene ring is almost vertical to the tetrahydro-pyridine ring. Intramolecular H-bonding of N–H···O type exists and completes an S (6) ring. In the crystal, the molecules are connected into a 3D network by a N–H···O and C–H···O intermolecular hydrogen bond. The bioassay indicates that the compound shows moderate insecticidal activity against Aphis craccivora.
合成了化合物6-氨基-8-(4-甲氧基苯基)-9-硝基-2,3,4,8-四氢吡啶并[2,1b][1,3]噻嗪-7-甲酸乙酯(C14H22N4O4S2)通过多组分反应,并通过 1H NMR、IR 和 X 射线衍射进行表征。晶体结构分析表明噻嗪环呈现半椅式构象。苯环几乎与四氢吡啶环垂直。分子内存在N-H·O型H键并形成S(6)环。在晶体中,分子通过N-H…O和C-H…O分子间氢键连接成3D网络。生物测定表明该化合物对Aphis craccivora具有中等的杀虫活性。