A method for annulation of the tetrahydrothiadiazine ring to benzimidazoles and 1,2,4-tri-azoles was developed. A number of earlier unknown [1,3,4]thiadiazino[3,2-a]benzimidazoles and triazolo[3,4-b][1,3,4]thiadiazines were obtained as spiro compounds with the oxindole fragment. According to NMR and X-ray diffraction data, the formation of the tetrahydrothiadiazine ring is a diastereospecific process.
一种方法被开发用于将四氢
噻二唑环环化为
苯并咪唑和
1,2,4-三唑。获得了多种早先未知的[1,3,4]噻二嗪[3,2-a]
苯并咪唑和三唑[3,4-b][1,3,4]噻二嗪,作为与氧
吲哚片段的螺旋化合物。根据核磁共振(NMR)和X射线衍射数据,四氢
噻二唑环的形成是一个非对称特异性的过程。