Pyrrole-Annulated Heterocyclic Systems. Synthesis of 2<i>H</i>-Pyrrolo[3,4-b][1,5]benzothiazepine 4,4-Dioxide Derivatives
作者:Roberto Di Santo、Roberta Costi、Silvio Massa、Marino Artico
DOI:10.1080/00397919808004303
日期:1998.7
Reduction of nitro group afforded ethyl 4-(2-aminophenylsulfonyl)-1H-pyrrole-3-carboxylate, which was cyclized to 2H-pyrrolo[3,4-b][1,5] benzothiazepin-10(9H)-one 4,4-dioxide. Similar procedure was used for the synthesis of 9,10-dihydro-10-methyl-2H-pyrrolo[3,4-b][1,5]benzothiazepine 4,4-dioxide.
摘要 2-硝基苯硫酚与丙炔酸乙酯缩合得到3-(2-硝基苯硫基)丙烯酸酯。硫原子氧化为砜基团得到 3-(2-硝基苯磺酰基) 丙烯酸乙酯,其与甲苯磺酰基甲基异氰化物 (TosMIC) 缩合得到 4-(2-硝基苯磺酰基) 吡咯-3-羧酸乙酯。硝基还原得到 4-(2-aminophenylsulfonyl)-1H-pyrrole-3-carboxylate 乙酯,将其环化为 2H-吡咯并[3,4-b][1,5] benzothiazepin-10(9H)-one 4 ,4-二氧化物。类似的程序用于合成 9,10-二氢-10-甲基-2H-吡咯并[3,4-b][1,5]苯并噻嗪 4,4-二氧化物。