New synthesis of some 1,2,5-benzothiadiazcpinc 1,1-dioxide derivatives. I
作者:Onofrio Migliara、Salvatore Petruso、Vincenzo Sprio
DOI:10.1002/jhet.5570160502
日期:1979.7
4-amino-3,5-dimethyl-isoxazole to give 3 and 7, respectively. Reduction of 3 with zinc powder and acetic acid afforded the 2,5-dihydro- and 2,3,4,5-tetrahydro-1,2,5-benzothiadiazepine I,1-dioxide derivatives (4 and 5). Catalytic hydrogenolysis of 7 and successive cyclization of the intermediate 8 gave the 3-ace-thyl-2,5-dihydro-4-methyl-1,2,5-benzothiadiazepine 1,1-dioxide (9). The structures were assigned
2-硝基苯磺酰氯与ω-氨基苯乙酮和4-氨基-3,5-二甲基-异恶唑反应,分别得到3和7。用锌粉和乙酸还原3,得到2,5-二氢-和2,3,4,5-四氢-1,2,5-苯并噻二氮杂I,1-二氧化物衍生物(4和5)。7的催化氢解和中间体8的连续环化生成3-乙酰基-2,5-二氢-4-甲基-1,2,5-苯并噻二氮杂1,1-二氧化物(9)。根据正确的元素数据和光谱证据对结构进行了分配。