Diastereoselective Synthesis of Spiro[Pyrrolo[2,1-B][1,3] Benzothiazole-3,5′-[1,3]Thiazolo[3,2-B][1,2,4]Triazol]-6′-Ones via Cycloaddition Reaction of Benzothiazolium Salts
作者:Qing Zeng、Demin Ren、Yulin Huang、Xinliang Fu、Xiaofang Li
DOI:10.3184/174751918x15314846558430
日期:2018.7
3-dipolar cycloaddition reaction of (Z)-5-arylidene[1,3]thiazolo[3,2-b][1,2,4]triazol-6(5H)-one and azomethine ylide, which was generated in situ by the reaction of N-4-methoxyphenacylbenzothiazolium bromides and triethylamine, afforded novel 2-(aryl)-1-(4-methoxybenzoyl)-1,2-dihydrospiro[pyrrolo[2,1-b][1,3]benzothiazole-3,5′-[1,3]thiazolo[3,2-b][1,2,4]triazol]-6′-ones in moderate yields. The structures
(Z)-5-亚芳基[1,3]噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮与偶氮甲碱叶立德的1,3-偶极环加成反应通过 N-4-甲氧基苯甲酰基苯并噻唑鎓溴化物和三乙胺反应原位生成,得到新型 2-(芳基)-1-(4-甲氧基苯甲酰基)-1,2-二氢螺[吡咯并[2,1-b][1,3] ]苯并噻唑-3,5'-[1,3]噻唑并[3,2-b][1,2,4]三唑]-6'-酮,产率适中。所有产物的结构都通过NMR、IR和HRMS光谱以及X射线晶体学分析进行了彻底表征。