通过2-(烷硫基)-吲哚-3-甲醛来通用合成硫代吡喃并[2,3- b:6,5- b ']二吲哚的新途径
摘要:
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。
Yttrium triflate-catalyzed efficient chemoselective S-benzylation of indoline-2-thiones using benzyl alcohols
摘要:
A highly efficient yttrium triflate-catalyzed chemoselective S-benzylation of indolin-2-thiones using variously substituted benzyl alcohols has been developed for the synthesis of indole-based sulfides. This procedure presents a greener approach for the synthesis of S-alkylated indoles. The reaction condition is amenable to primary, secondary, and tertiary benzylic alcohols as the benzyl group donors. (C) 2010 Elsevier Ltd. All rights reserved.
Yttrium triflate-catalyzed efficient chemoselective S-benzylation of indoline-2-thiones using benzyl alcohols
作者:Mukund Jha、Oro Enaohwo、Stephanie Guy
DOI:10.1016/j.tetlet.2010.11.163
日期:2011.2
A highly efficient yttrium triflate-catalyzed chemoselective S-benzylation of indolin-2-thiones using variously substituted benzyl alcohols has been developed for the synthesis of indole-based sulfides. This procedure presents a greener approach for the synthesis of S-alkylated indoles. The reaction condition is amenable to primary, secondary, and tertiary benzylic alcohols as the benzyl group donors. (C) 2010 Elsevier Ltd. All rights reserved.
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。