Dual SNAr reaction in activated ortho-halonitrobenzene: direct synthesis of substituted 1,2,3,4-tetrahydroquinoxalines, 2,3-dihydro-1,4-benzoxazines, and 1,4-benzodioxines
作者:Mahesh S. Deshmukh、Biswajit Das、Nidhi Jain
DOI:10.1039/c3ra44386h
日期:——
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。