A new route to the versatile synthesis of thiopyrano[2,3-b:6,5-b′]diindoles via 2-(alkylthio)-indole-3-carbaldehydes
作者:Mukund Jha、Michael Edmunds、Kate-lyn Lund、Ashley Ryan
DOI:10.1016/j.tetlet.2014.08.100
日期:2014.10
versatile synthesis of symmetrically and unsymmetricallysubstituted thiopyrano[2,3-b:6,5-b′]diindoles has been developed by the condensation of 2-(alkylthio)-indole-3-carbaldehydes with indoline-2-thiones in the presence of catalytic amount of ethylenediamine diacetate (EDDA). The EDDA mediated condensation leads to a spontaneous cyclization followed by aromatization to form thiopyrano[2,3-b:6,5-b′]diindoles
通过2-(烷硫基)-吲哚-3-甲醛与二氢吲哚-2-硫酮的缩合反应,已开发出一种通用的对称和不对称取代的噻喃并[2,3- b:6,5- b ']二吲哚化合物。存在催化量的乙二胺二乙酸酯(EDDA)。EDDA介导的缩合导致自发环化,然后进行芳构化,以定量收率形成噻喃并[2,3- b:6,5- b ']二吲哚。
Synthesis of some novel and complex thiopyrano indole derivatives from simple oxindole via intramolecular domino hetero Diels–Alder reactions
作者:Swarup Majumder、Pulak J. Bhuyan
DOI:10.1016/j.tetlet.2011.10.133
日期:2012.1
Some novel polycyclic thiopyrano[2,3-b]indole derivatives 7 were synthesized from simple oxindole 1 by exploring intramolecular domino hetero Diels–Alder reactions strategy.
通过研究分子内多米诺骨牌异质Diels-Alder反应策略,从简单的oxindole 1合成了一些新颖的多环噻喃并[2,3- b ]吲哚衍生物7。