Isothiazoles. Part 13: Synthesis of sulfamic esters, [1,2]thiazete S,S-dioxides, benzo[e][1,2]thiazine S,S-dioxides or triazoles by reaction of isothiazole dioxides with sodium azide
作者:Francesca Clerici、Maria Luisa Gelmi、Raffaella Soave、Leonardo Lo Presti
DOI:10.1016/s0040-4020(02)00445-3
日期:2002.6
The reaction of NaN3 with 5-substituted 3-diethylamino-4-(4-methoxyphenyl)-isothiazole 1,1-dioxides is presented affording [2-cyano-1-diethylamino-2-(4-methoxyphenyl)-ethylidene]-sulfamic acid derivatives, 3-diethylamino-1,1-dioxo-4-(4-methoxyphenyl)-1,2-dihydro-[1,2]thiazete-4-carbonitrile, 3-diethylamino-7-methoxy-1,1-dioxo-1,4-dihydro-benzo[e][1,2]thiazine-4-carbonitrile or triazole derivatives
提出了NaN 3与5-取代的3-二乙基氨基-4-(4-甲氧基苯基)-异噻唑1,1-二氧化物的反应,得到[2-氰基-1-二乙基氨基-2-(4-甲氧基苯基)-亚乙基]-氨基磺酸衍生物,3-二乙氨基-1,1-二氧-4-(4-甲氧基苯基)-1,2-二氢-[1,2]噻唑特-4-腈,3-二乙氨基-7-甲氧基-1,1 -二氧代-1,4-二氢-苯并[ e ] [1,2]噻嗪-4-腈或三唑衍生物。反应的结果在很大程度上取决于C-5取代基,正确选择反应条件可以使反应的方向以令人满意的收率形成氨基磺酸酯或[1,2]噻唑特腈或三唑。