[1,5] hydrogen shift in aza-ortho-xylylenes generated from 3-alkyl-2,1-benzisothiazoline 2,2-dioxides.
作者:Krzysztof Wojciechowski
DOI:10.1016/s0040-4020(01)80198-8
日期:1993.1
1-benzisothiazoline 2,2-dioxides 4 undergo [1,5] hydrogen shift leading to 2-aminostyrene derivatives 6. In the case of 1,3-diallylbenzosultam 7 such transformation leads to N-allylaminophenyl-1,3-butadiene 9 which cyclizes to 5,6,6a,7,8,10a-hexahydrophenanthridine 10. Cyclobutanospiro-3-benzosultams 11 after the extrusion of SO2 and the [1,5] hydrogen shift form unstable phenylcyclobutenes, which undergo
由3-烷基-2,1-苯并噻唑啉2,2-二氧化物4热挤出SO 2生成的氮杂邻二甲苯基经历[1,5]氢转移,生成2-氨基苯乙烯衍生物6。在1,3-二烯丙基苯并sultam 7的情况下,这种转化导致N-烯丙基氨基苯基-1,3-丁二烯9,其环化为5,6,6a,7,8,10a-六氢菲啶10。SO 2的挤出和[1,5]氢转移后的环丁烷螺-3-苯并sultams 11形成了不稳定的苯基环丁烯,这些苯环丁烯经历了开环成2-苯基-1,3-丁二烯的过程14。3-氯甲基-3-甲基苯并sultams 17转化为1,3-二甲基吲哚衍生物21。