Photocatalyst-free hypervalent iodine reagent catalyzed decarboxylative acylarylation of acrylamides with α-oxocarboxylic acids driven by visible-light irradiation
作者:Wangqin Ji、Hui Tan、Min Wang、Pinhua Li、Lei Wang
DOI:10.1039/c5cc08253f
日期:——
A hypervalent iodine (III) reagent catalyzed carbonylarylation of acrylamides with [small alpha]-oxocarboxylic acids driven by visible-light without photoredox catalyst has been developed. The reactions generate the corresponding products in good yields...
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
Synthesis of Carbonyl-Containing Oxindoles via Ni-Catalyzed Reductive Aryl-Acylation and Aryl-Esterification of Alkenes
作者:Zhengtian Ding、Wangqing Kong
DOI:10.3390/molecules27185899
日期:——
active natural products and pharmaceutical molecules. Nickel-catalyzed reductive aryl-acylation of alkenes using aryl anhydrides or alkanoyl chlorides as acyl sources is developed, providing 3,3-disubstituted oxindoles bearing ketone functionality at the 3-position. Moreover, nickel-catalyzed reductive aryl-esterification of alkenes using chloroformate as ester sources is further developed, affording
Visible-Light-Mediated Generation of Acyl Radicals from Triazine Esters
作者:Tao Wang、Yuan-Yuan Zong、Wan-Zhong Feng、Li-Zhu Wu、Qiang Liu
DOI:10.1021/acs.joc.3c01377
日期:2023.9.1
Acyl radicals are significant synthetic active species in organic synthesis. However, their generation via green and compatible methods remains challenging. Herein, we report an unprecedented visible-light-mediated approach for generating aryl acyl radicalsfrom readily available triazine esters. This protocol with mild and redox-neutral conditions affords a diverse array of oxindoles attached to alcohol
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.