A visible-light-induced carbonylation of indoles with phenols for the synthesis of indole-3-carboxylates has been developed. The reaction proceeded via a radical carbonylation process in which elementary I2 was used as an effective photosensitive initiator and, thus, avoided the use of transition metal catalysts. A series of different aryl indole-3-carboxylates were prepared in moderate to good yields
已开发出用于合成 indole-3-carboxylates 的可见光诱导的吲哚与酚的羰基化反应。该反应通过自由基羰基化过程进行,其中使用元素 I 2作为有效的光敏引发剂,从而避免使用过渡金属催化剂。以中等至良好的产率制备了一系列不同的芳基吲哚-3-羧酸酯。几种含酚天然产物和药物的后期功能化进一步突出了该方法的广泛适用性。
A New Method for the Synthesis of 1-Methyl-1H-indole-3-carboxylate Derivatives, Employing Copper(II)
作者:Ali Akbari、Muhammad Saleh Faryabi
DOI:10.1055/a-2035-0040
日期:——
1-methyl-1H-indole-3-carboxylates by cross-dehydrogenative coupling. However, the coupling reactions are a way to functionalize the α-carbon of iminiums from tertiary amines. The synthesis of 1-methyl-1H-indole-3-carboxylates from N,N-dimethylaniline with bromoacetates has not been reported. In the present work, we describe a novelroute for synthesizing 1-methyl-1H-indole-3-carboxylates with N,N-dimethylaniline
我们报告了一种通过交叉脱氢偶联合成 1-methyl-1 H -indole-3-carboxylates 的有效方法。然而,偶联反应是一种从叔胺中官能化亚胺的 α-碳的方法。从N , N-二甲基苯胺和溴乙酸盐合成 1-methyl- 1H- indole-3-carboxylates的报道尚未见报道。在目前的工作中,我们描述了一种合成 1-methyl-1 H -indole-3-carboxylates with N , N的新路线-二甲基苯胺和范围广泛的溴乙酸苯酯衍生物。程序简单、产率高至极佳 (69–90%) 等特点使该方法成为在叔丁基存在下使用 Cu(OAc) 2 ·H 2 O作为催化剂制备吲哚衍生物的高效程序氢过氧化物。
Pd-Catalyzed C–H Carbonylation of (Hetero)arenes with Formates and Intramolecular Dehydrogenative Coupling: A Shortcut to Indolo[3,2-<i>c</i>]coumarins
作者:Jie Wu、Jingbo Lan、Siyuan Guo、Jingsong You
DOI:10.1021/ol502749b
日期:2014.11.21
An efficient protocol for the synthesis of (hetero)aryl carboxylic esters has been achieved by Pd-catalyzed CH carbonylation of (hetero)arenes with aryl formates. A relatively wide range of functional groups can be tolerated in this transformation, and the corresponding esters are obtained in good yields. On this basis, an intramolecular oxidative CH/CH coupling has been developed to prepare indolo[3,2-c]coumarins.
A General Method for Palladium-Catalyzed Direct Carbonylation of Indole with Alcohol and Phenol
作者:Rui Lang、Lijun Shi、Dengfeng Li、Chungu Xia、Fuwei Li
DOI:10.1021/ol3017726
日期:2012.8.17
A novel strategy involving a first oxidative iodination and subsequent Pd-0-catalyzed carbonylation to yield indole-3-carboxylate has been developed. It showed perfect generality to indole, alcohol, and phenol. The current methodology could also be conveniently applied to the synthesis of biologically active tropisetron from simple indole and tropine.
Selective Reductive Removal of Ester and Amide Groups from Arenes and Heteroarenes through Nickel-Catalyzed C−O and C−N Bond Activation
a hydrosilane were used for the efficient reductive defunctionalization of aryl and heteroaryl esters through a decarbonylative pathway. This versatile method could be used for the removal of ester and amide functional groups from various organic molecules. Moreover, a scale‐up experiment and a synthetic application based on the use of a removable carboxylic acid directing group highlight the usefulness