An unprecedented one-pot synthesis of substituted 1,2,3,4-tetrahydroquinoxalines, 2,3-dihydro-1,4-benzoxazines, and 1,4-benzodioxines from activated ortho-halonitrobenzenes has been accomplished by dual nucleophilic aromatic substitution (SNAr) of halogen followed by substitution of the nitro group by secondary diamines, secondary amino alcohols, and diols respectively.
通过对
氯取代的氮杂环合成,成功实现了一种前所未有的一锅法合成取代的1,2,3,4-四氢喹喱啉、2,3-二氢-1,4-苯并
噁唑和
1,4-苯并二恶烷,反应由双亲核芳香取代(SNAr)卤素开始,随后分别用二级胺、二级
氨基醇和二醇替代硝基。