Metal-Free Generation of Acyl Radical via Photoinduced Single-Electron Transfer from Lewis Base to Acyl Chloride
作者:Lei Bao、Zhi-Xiang Wang、Xiang-Yu Chen
DOI:10.1021/acs.orglett.2c03339
日期:2022.11.11
We herein describe a simple approach for generating acyl radical from acyl chloride via photoinduced single-electron transfer. It has been demonstrated that the generated acyl radicals could react with various substrates, including isocyanides, methacrylamides, alkenes, alkynes, and enynes, to afford diverse heterocycles (>10 classes). Mechanistic analyses show that a photoactive charge transfer complex
Palladium-Catalyzed Carbonylative Hiyama–Denmark Reaction toward the Synthesis of Aryl Carbonyl-Containing Oxindoles
作者:Xiong Li、Xuemei Zhang、Baojian Xiong、Zhong Lian
DOI:10.1021/acs.joc.2c02479
日期:——
A palladium-catalyzed domino Heck cyclization/carbonylative Hiyama–Denmark cross-coupling reaction between alkene-tethered aryl iodides and silylcarboxylic acids is presented. This reaction proceeds well without toxic carbon monoxide (CO) gas and has good functional group tolerance, providing an alternative access to carbonyl-containing oxindoles. In this transformation, silylcarboxylic acids play
提出了一种钯催化的多米诺 Heck 环化/羰基化 Hiyama-Denmark 烯烃系芳基碘化物和甲硅烷基羧酸之间的交叉偶联反应。该反应在没有有毒一氧化碳 (CO) 气体的情况下进行得很好,并且具有良好的官能团耐受性,为含羰基羟吲哚提供了另一种途径。在这种转化中,甲硅烷基羧酸作为 CO 源和亲核试剂发挥双重作用。
Iron-catalyzed carbonylation–arylation of N-arylacrylamides for synthesis of oxindole derivatives
作者:Fan Jia、Kaisheng Liu、Hui Xi、Shenglin Lu、Zhiping Li
DOI:10.1016/j.tetlet.2013.09.048
日期:2013.11
An efficient method for oxindole synthesis is established by iron-catalyzed carbonylation-arylation of N-arylacrylamides with aldehydes. 3-Functionalized oxindoles are synthesized smoothly using FeCl3 as catalyst and TBHP as oxidant. The obtained oxindoles can be used for further transformations to give diverse indole alkaloid structure motifs. (C) 2013 Elsevier Ltd. All rights reserved.
Silver-Catalyzed Decarboxylative Acylarylation of Acrylamides with α-Oxocarboxylic Acids in Aqueous Media
作者:Hua Wang、Li-Na Guo、Xin-Hua Duan
DOI:10.1002/adsc.201300468
日期:2013.8.12
AbstractA mild and efficient silver‐catalyzed acylarylation of activated alkenes with easily available α‐oxocarboxylic acids has been developed. The reactions provide a rapid access to a variety of functionalized oxindoles via a tandem decarboxylative radical cyclization strategy. This transformation proceeds well under mild reaction conditions and exhibits excellent functional group tolerance, affording the desired oxindoles in good to excellent yields.magnified image