作者:A.S. Angeloni、D. Dal Monte、S. Pollicino、E. Sandri、G. Scapini
DOI:10.1016/s0040-4020(01)97073-5
日期:1974.1
4,7-dione. On the basis of NMR data “4 - hydroxy - 5 - nitroso-, 4 - hydroxy - 7 - nitroso- and 5 - hydroxy - 4 - nitroso -2,1,3- benzothiadiazole” exist predominantly in quinonemonoxime forms. Configurations were assigned to geometrical isomers. The 4,5- and 4,7 - di - O - methyidioximinobenzothiadiazoles were also investigated. Four and two geometrical isomers of the 4,5- and 4,7-derivatives, respectively
对于一系列2,1,3-苯并噻唑-4,5和4,7-二酮的单肟,二肟和单-O-甲基二肟,已经确定了有机溶剂中的NMR光谱和水中的解离常数。根据NMR数据,“ 4-羟基-5-亚硝基,4-羟基-7-亚硝基和5-羟基-4-亚硝基-2,1,3-苯并噻二唑”主要以醌一肟形式存在。将构型分配给几何异构体。还研究了4,5-和4,7-二-O-甲基二氧代二氨基苯并噻二唑。4,5和4,7衍生物的四个和两个几何异构体已被分离,并描述了每种异构体的物理和光谱性质。