Visible-light-enabled spirocyclization of alkynes leading to 3-sulfonyl and 3-sulfenyl azaspiro[4,5]trienones
作者:Wei Wei、Huanhuan Cui、Daoshan Yang、Huilan Yue、Chenglong He、Yulong Zhang、Hua Wang
DOI:10.1039/c7gc02330h
日期:——
A visible-light-induced strategy has been established for the synthesis of 3-sulfonyl and 3-sulfenyl azaspiro[4,5]trienones at room temperature in air.
Ag-Catalyzed Oxidative <i>ipso</i>-Cyclization via Decarboxylative Acylation/Alkylation: Access to 3-Acyl/Alkyl-spiro[4.5]trienones
作者:Chada Raji Reddy、Dattahari H. Kolgave、Muppidi Subbarao、Mounika Aila、Santosh Kumar Prajapti
DOI:10.1021/acs.orglett.0c01588
日期:2020.7.17
A strategy to functionalized spiro[4.5]trienones, by domino silver-catalyzed decarboxylative acylation or alkylation/ ipso-cyclization of N-arylpropiolamides with α-ketoacids/alkyl carboxylic acids, is presented. This transformation offers a wide range of substituted 3-acyl/alkyl-spiro[4.5]trienones in high yields with a broad substrate scope. The approach was further extended to access fused tricyclic
Silver-catalyzed carbon–phosphorus functionalization of N-(p-methoxyaryl)propiolamides coupled with dearomatization: access to phosphorylated aza-decenones
Silver-catalyzed cascade difunctionalization of N-(p-methoxyaryl)propiolamides coupled with dearomatization was achieved and used to regiospecifically construct a variety of phosphorylated aza-decenones bearing adjacent quaternary stereocenters under mild conditions in moderate to excellent yields.
A general and metal-free visible-light-induced decarboxylative arylation procedure at room temperature was described for the construction of acylated heterocyclic derivatives, such as benzimidazo/indolo[2,1-a]isoquinolin-6(5H)-ones, aroylazaspiro[4.5]trienones, thioflavones, and so on. This practical arylation procedure was conducted by using 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN)
描述了一种在室温下通用且无金属的可见光诱导的脱羧芳基化方法,用于构建酰化杂环衍生物,例如苯并咪唑/吲哚并[ 2,1 - a ]异喹啉-6(5 H)-ones,芳酰基azaspiro [4.5]三烯酮,硫代黄酮等。通过在温和的条件下使用2,4,5,6-四(9 H-咔唑-9-基)间苯二甲腈(4CzIPN)作为光催化剂来进行该实用的芳基化步骤,避免了使用额外的碱,传统的加热,和金属试剂。