dioxides with diazoalkanes and nitrile oxides bicyclic pyrazolo[3,4-d]isothiazole and isothiazolo[5,4-d]isoxazole S,S-dioxides were obtained in good yield through a regioselective cycloaddition reaction. Through cycloaddition reaction of 3-benzylamino-4-bromo-isothiazole S,S-dioxide labile cycloadducts were formed that underwent in situ dehydrobromination affording the corresponding aromatized compounds
通过使4,5-未取代的
异噻唑二氧化物与重氮
烷烃和腈氧化物反应,通过区域选择性环加成反应以良好的产率获得了双环
吡唑并[3,4- d ]
异噻唑和
异噻唑并[5,4- d ]
异恶唑S,S-二氧化物。通过3-苄基
氨基-4-
溴-
异噻唑S的环加成反应,形成了S-二氧化物不稳定的环加合物,其进行了原位脱氢
溴化,得到了相应的芳构化化合物。