Aerobic Oxidative Cascade Thiolation and Cyclization to Construct Indole-Fused Isoquinolin-6(5<i>H</i>)-one Derivatives in EtOH
作者:Huanhuan Cui、Changhao Niu、Chun Zhang
DOI:10.1021/acs.joc.1c02027
日期:2021.11.5
A practical method to construct sulfenylated indole-fused isoquinolin-6(5H)-one derivatives has been developed. Using eco-friendly ethanol as the solvent and air as the oxidant, this reaction could be compatible with sensitive molecular framework. The utility of the product was well illustrated by further transformations. Moreover, the reaction mechanism was investigated by control experiments.
开发了一种构建亚磺酰化吲哚稠合异喹啉-6(5 H )-one 衍生物的实用方法。使用环保乙醇作为溶剂,空气作为氧化剂,该反应可以与敏感的分子骨架相容。进一步的转变很好地说明了产品的实用性。此外,通过对照实验研究了反应机理。
Manganese(<scp>iii</scp>)-promoted tandem phosphinoylation/cyclization of 2-arylindoles/2-arylbenzimidazoles with disubstituted phosphine oxides
作者:Shuai-Shuai Jiang、Yu-Ting Xiao、Yan-Chen Wu、Shu-Zheng Luo、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/d0ob00877j
日期:——
1-a]isoquinolin-6(5H)-ones through manganese(III)-promoted tandem phosphinoylation/cyclization of 2-arylindoles or 2-arylbenzimidazoles with disubstituted phosphineoxides was developed. In this transformation, new C–P bond and C–C bond were constructed simultaneously under silver-free conditions, exhibiting a broad substrate scope. It was noted that not only diarylphosphine oxides but also dialkyl and arylalkyl-phosphine
一种简单实用的方法,通过锰合成磷酸取代的吲哚[2,1 - a ]异喹啉-6(5 H)-和苯并咪唑[2,1 - a ]异喹啉-6(5 H)-。III)促进了双芳基膦酸酯或2-芳基苯并咪唑与双取代氧化膦的串联膦酰基化/环化反应。在这种转变中,在无银条件下同时构建了新的C–P键和C–C键,具有广泛的底物范围。注意到不仅二芳基膦氧化物,而且二烷基和芳基烷基膦氧化物也符合条件。
Iron-catalysed radical cyclization to synthesize germanium-substituted indolo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones and indolin-2-ones
作者:Yani Luo、Tian Tian、Yasushi Nishihara、Leiyang Lv、Zhiping Li
DOI:10.1039/d1cc03907e
日期:——
A simple and efficient iron-catalysed radical cyclization to synthesize germanium-substituted indolo[2,1-a]isoquinolin-6(5H)-ones and indolin-2-ones has been developed.
Metal-Free Photosynthesis of Alkylated Benzimidazo[2,1-<i>a</i>]isoquinoline-6(5<i>H</i>)-ones and Indolo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones in PEG-200
A visible-light-induced decarboxylation reaction was developed for the synthesis of alkylated benzimidazo[2,1-a]isoquinoline-6(5H)-ones and indolo[2,1-a]isoquinolin-6(5H)-ones under metal-free conditions. Impressively, metal catalysts and traditionally volatile organic solvents could be effectively avoided.
A visible-light-driven cascade radical cyclization process of N-methacryloyl-2-phenylbenzimidazole has been established with α-carbonyl alkyl bromide. This protocol provides an efficient and practical method for the synthesis of various α-carbonyl alkyl-substituted benzimidazo[2,1-α]isoquinolin-6(5H)-ones in outstanding yields, mild reaction conditions and excellent functional group tolerance.
用α-羰基烷基溴建立了可见光驱动的N-甲基丙烯酰基-2-苯基苯并咪唑的级联自由基环化过程。该协议为合成各种α-羰基烷基取代的苯并咪唑[2,1 - α ]isoquinolin-6(5 H )-ones 提供了一种高效实用的方法,具有出色的收率、温和的反应条件和优异的官能团耐受性。