Metal-free, one-pot tandem reactions of o-(1-alkynyl)benzamides proceed smoothly in the presence of Lawesson’s reagent leading to 1,3-dihydrobenzo[c]thiophene-imine derivatives in moderate to excellent yields under mild conditions. The method is highly regiospecific for the o-(1-alkynyl)benzothioamide, and only the five-membered-ring product is generated via a 5-exo-dig cyclization involving the
在Lawesson试剂的存在下,o-(1-炔基)苯甲酰胺的无金属单锅串联反应可顺利进行,从而在温和的条件下以中等至极好的收率得到1,3-二氢苯并[ c ]噻吩-亚胺衍生物。该方法对邻-(1-炔基)苯并硫代酰胺具有高度的区域特异性,并且通过涉及硫原子的5- exo- dig环化仅生成五元环产物。 邻-(1-炔基)苯并硫代酰胺-串联反应-Lawesson试剂-无金属-杂环
Oxidative <i>oxy</i>-cyclization of 2-alkynylbenzamide enabled by TBAB/Oxone: switchable synthesis of isocoumarin-1-imines and isobenzofuran-1-imine
作者:Yan-Hua Wang、Banlai Ouyang、Guanyinsheng Qiu、Hongwei Zhou、Jin-Biao Liu
DOI:10.1039/c9ob00320g
日期:——
A TBAB-controlled switchable synthesis of isocoumarin-1-imine and isobenzofuran-1-imine from 2-alkynylbenzamide in water is described in this paper.
Facile synthesis of 11-aryl-6H-isoindolo[2,1-a]indol-6-ones via hypervalent iodine(<scp>iii</scp>)-promoted cascade cyclization
作者:Kapil Dev、Rakesh Maurya
DOI:10.1039/c4ra10452h
日期:——
An efficient method was developed for the synthesis of a tetracyclic fused indole and isoindoline ring system, under metal-free conditions. The hypervalentiodine PIDA-mediated regioselective as well as chemoselective intramolecular cascade oxidative cyclization of 2-(1-arylethynyl)benzamides afforded 11-aryl-6H-isoindolo[2,1-a]indol-6-ones at room temperature in good to excellent yields.
开发了一种在无金属条件下合成四环稠合吲哚和异吲哚啉环系的有效方法。2-(1-芳基乙炔基)苯甲酰胺的高价碘PIDA介导的区域选择性以及化学选择性的分子内级联氧化环化在室温下提供了11-芳基-6 H-异吲哚并[2,1 - a ]吲哚-6-酮。达到优异的产量。