Bremer, Justus Liebigs Annalen der Chemie, 1937, vol. 529, p. 291
作者:Bremer
DOI:——
日期:——
Synthesis of Indoles by Reductive Cyclization of Nitro Compounds Using Formate Esters as CO Surrogates
作者:Manar Ahmed Fouad、Francesco Ferretti、Dario Formenti、Fabio Milani、Fabio Ragaini
DOI:10.1002/ejoc.202100789
日期:2021.9.14
A very efficient, general and scalable protocol for the preparation of indoles and other N-heterocycles from suitably substituted nitroarenes using alkyl and phenyl formates as CO surrogates was described. Using phenyl formate, the products were isolated in yields often higher than those previously achieved by using gaseous CO. The mechanism of both the decarbonylation reaction of phenyl formate and
描述了使用烷基和苯基甲酸酯作为 CO 替代物从适当取代的硝基芳烃制备吲哚和其他N-杂环的非常有效、通用和可扩展的方案。使用甲酸苯酯,产物的分离产率通常高于以前使用气态 CO 实现的产率。通过动力学和机理研究阐明了甲酸苯酯的脱羰反应和环化反应的机理。
Synthesis of 2-Aryl-1-hydroxyazaindolesand 2-Arylazaindoles via Oxidation of <i>o-</i>Hydroxyaminostyrylpyridines
作者:Daniel Kuzmich、Carol Mulrooney
DOI:10.1055/s-2003-40884
日期:2003.8
are prepared via an oxidation/cyclization of o-hydroxyaminostyrylpyridines with DDQ. Reduction of the N-OH bond affords the corresponding 2-arylazaindoles (1H-pyrrolopyridines). The scope of the cyclization is explored via (i) the condensation of 4-methyl-3-nitropyridine with various aryl aldehydes to afford 2-aryl substituted 6-azaindoles and, (ii) the synthesis of 2-phenyl-4-, 5- and 7-azaindoles.