Synthesis and reactions of 3-alkylsulfanyl-1,3-dihydro-2,1-benzisothiazole 2,2-dioxides
作者:Helena Modrzejewska、Krzysztof Wojciechowski
DOI:10.1016/j.tet.2005.07.015
日期:2005.9
Alkyl- and arylsulfanylation of 1,3-dihydro-2,1-benzisothiazole 2,2-dioxides (benzosultams) 1a–c and pyridosultam 1d with dialkyl and diaryl disulfides provides dithioacetals of 2-aminobenzaldehydes 6–13. 1,3-Dimethylbenzosultam 19 with disulfides forms 3-alkyl(aryl)sulfanyl-1,3-dimethylbenzosultams 20–22 that undergo thermal extrusion of SO2 followed by a [1,5] sigmatropic hydrogen shift in the intermediate
烷基-和1,3-二氢-2,1-苯并异噻唑2,2-二氧化物(benzosultams)arylsulfanylation 1A - Ç和pyridosultam 1D与二烷基二芳基二硫化物提供的2-aminobenzaldehydes二硫6 - 13。1,3- Dimethylbenzosultam 19与二硫化物形式的3 -烷基(芳基)硫基-1,3- dimethylbenzosultams 20 - 22经历SO的热挤压2后跟一个[1,5]σ迁移氢在中间氮杂移邻-亚二甲苯导致1-芳基乙烯基硫化物24 – 26。苯并-和嘧啶磺胺类的串联烷基化-磺酰化1A - d与4-溴丁基硫氰酸给出tetrahydrothiopyrano螺benzosultams 27 - 30的是,如此挤压后2和[1,5]氢移,形成2-芳基-5,6-二氢-4- ħ -thiopyrans 32 - 35。吡啶并杜鹃1d