Synthesis of Tetrasubstituted α,β‐Unsaturated Aldehydes
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Radical 1,4‐Aryl Migration/Trifluoromethylthiolation Cascade Reaction of Aryl Propynyl Ethers
作者:Chun‐Huan Guo、Dao‐Qian Chen、Si Chen、Xue‐Yuan Liu
DOI:10.1002/adsc.201700534
日期:2017.9.4
A one‐pot synthesis of tetrasubstituted acrylaldehydes via difunctionalization of aryl propynyl ethers has been achieved, which involves a trifluoromethylthiolation process and a radical 1,4‐aryl migration from oxygen to carbon. The reaction shows excellent conversion of aryl propynyl ethers into trifluoromethyl‐containing α,β‐unsaturated aldehydes through a radical pathway.
Facile synthesis of substituted alkynes by nano-palladium catalyzed oxidative cross-coupling reaction of arylboronic acids with terminal alkynes
作者:Xiaopeng Nie、Suli Liu、Yan Zong、Peipei Sun、Jianchun Bao
DOI:10.1016/j.jorganchem.2010.12.038
日期:2011.4
The oxidative cross-coupling of terminal alkynes with arylboronicacidscatalyzed by the porous palladium nanospheres was developed. In the presence of silver oxide, triphenylphosphine and cesium carbonate, the reaction provided the corresponding arylalkynes with good to excellent yields. There were also other obvious advantages such as broad applicability, high selectivity, simple experimental operation
Assembly of 3-(trifluoromethyl)thiochromenes via a regioselective trifluoromethylthioarylation of (3-arylprop-2-ynyl)oxybenzenes with trifluoromethanesulfanylamide
作者:Tong Liu、Guanyinsheng Qiu、Qiuping Ding、Jie Wu
DOI:10.1016/j.tet.2016.01.053
日期:2016.3
trifluoromethanesulfanylamide is reported, which affords 3-(trifluoromethyl)thiochromenes in good yields with high regioselectivity. The reaction works efficiently in the presence of 2.0 equiv of bismuth chloride, and different functional groups can be compatible under the conditions. The related (3,4-dihydronaphthalen-2-yl) (trifluoromethyl)sulfane and 3-((trifluoromethyl)thio)-1,2-dihydroquinoline can be generated
Electrochemical Oxidative Annulation of Inactivated Alkynes for the Synthesis of Sulfonated 2<i>H</i>-Chromene Derivatives
作者:Jagadeesh Reddy Thondur、Duddu S. Sharada、Gedu Satyanarayana
DOI:10.1021/acs.orglett.3c00691
日期:2023.4.28
oxidative annulation of inactivated propargyl aryl ethers with sulfonyl hydrazides leading to 3-sulfonated 2H-chromenes has been achieved. Significantly, this protocol involves a green approach that works under mild reaction conditions using a constant current in an undivided cell and is devoid of oxidants and catalysts. Notably, the process exhibited a broad scope and functional group tolerance to deliver
已实现失活的炔丙基芳基醚与磺酰肼的独特、简便且直接的电化学氧化环化,从而生成 3-磺化 2 H-色烯。值得注意的是,该协议涉及一种绿色方法,该方法在温和的反应条件下工作,在未分割的电池中使用恒定电流,并且没有氧化剂和催化剂。值得注意的是,该过程表现出广泛的范围和官能团耐受性以提供 2 H -色烯,并且将代表与传统色烯合成相比的替代和可持续战略。