Reactivity of 2-methyl-4-(1-pyrrolidinyl)-2<i>H</i>-1,2-benzothiazine 1,1-dioxide towards<i>p</i>-toluenesulphonyl azide
作者:Roberto Consonni、Piero Dalla Croce、Raffaella Ferraccioli
DOI:10.1002/jhet.5570270260
日期:1990.2
The 2-methyl-2H-1,2-benzothiazin-4-(3H)-one 1,1 dioxide (2), obtained according to a new, one-pot method, is transformed into the pyrrolidino enamine 3. Reaction of p-toluenesulphonyl azide with 3 gives, via an unstable triazoline adduct which loses nitrogen, the two isomeric tosylamino derivatives 4 and 5. The structures have been assigned by exhaustive nmr analysis and some aspects on their formation
根据一种新的一锅法获得的2-甲基-2 H -1,2-苯并噻嗪-4-(3 H)-一1,1二氧化物(2)被转化为吡咯烷基烯胺3。的反应p与甲苯磺酰叠氮化物3给出,通过不稳定的三唑加合物失去氮,两种异构体甲苯磺酰衍生物4和5。通过详尽的核磁共振分析确定了该结构,并讨论了其形成和化学行为的某些方面。