Electrochemical Oxidative Cross‐Coupling Reaction to Access Unsymmetrical Thiosulfonates and Selenosulfonates
作者:Xiaofeng Zhang、Ting Cui、Yanghao Zhang、Weijin Gu、Ping Liu、Peipei Sun
DOI:10.1002/adsc.201900047
日期:2019.4.23
The electrochemical oxidativecross‐dehydrogenativecoupling of arylsulfinic acids with thiophenols was achieved via a radical process. A wide range of arylsulfinic acids and substituted thiophenols were found to be tolerated, providing unsymmetrical thiosulfonates in good to excellent yields. This electrochemical method can also be used for the reaction of arylsulfinic acids with disulfides or diselenides
Organocatalytic selenosulfonylation of the C–C doublebond of α,β-unsaturatedketones to construct two contiguous stereogenic centers in an aqueous medium was described. A series of α-selenyl and β-sulfonyl ketones with various functional groups were synthesized in good yields and enantioselectivities with saturated NaCl solution as the solvent. In addition, this protocol had been successfully scaled
Metal-Free Radical Annulation of Oxygen-Containing 1,7-Enynes: Configuration-Selective Synthesis of (<i>E</i>)-3-((Arylsulfonyl)methyl)-4-Substituted Arylidenechromene Derivatives
作者:Kaimin Mao、Mouwang Bian、Lei Dai、Jinghang Zhang、Qiuyu Yu、Chang Wang、Liangce Rong
DOI:10.1021/acs.orglett.0c03946
日期:2021.1.1
A novel strategy for the synthesis of (E)-3-((arylsulfonyl)methyl)-4-substituted benzylidenechromene derivatives via a metal-free radical annulation reaction of oxygen-containing 1,7-enynes with thiosulfonates has been developed. The reaction shows broad substrate scope, wide functional group tolerance, and moderate to excellent yields. Moreover, thiosulfonates were well driven to achieve the bifunctionalization
Enantioselective addition of selenosulfonates to α,β-unsaturated ketones
作者:Shilong Luo、Nan Zhang、Zhen Wang、Hailong Yan
DOI:10.1039/c8ob00359a
日期:——
An organo-catalyzed enantioselective addition of selenosulfonates to α,β-unsaturatedketones was developed for the first time. With a chiral squaramide as an efficient catalyst, the desired α-selenylated ketones were obtained in a good yields with high enantioselectivity up to 89% ee, and good results could be obtained on a gram scale. The products could also be efficiently transformed into useful
Metal-free difunctionalization of alkynes to access tetrasubstituted olefins through spontaneous selenosulfonylation of vinylidene <i>ortho</i>-quinone methide (VQM)
difunctionalization of alkynes to access tetrasubstituted olefins through spontaneous selenosulfonylation of vinylidene ortho-quinone methide (VQM) was described herein. The reaction was conducted under mild conditions without any catalysts or additives. Preliminary mechanism studies revealed that the formation of VQM was the key for this alkyne di-functionalization reaction. The reaction could be applied
本文描述了炔烃的无金属双官能化,以通过亚乙烯基邻甲基醌(VQM)的自发硒代磺酰基化来获得四取代的烯烃。反应在温和条件下进行,没有任何催化剂或添加剂。初步的机理研究表明,VQM的形成是这种炔烃双官能化反应的关键。该反应可用于轴向手性苯乙烯的对映选择性不对称合成。此外,硒代磺酰化加合物可以转化为有用的萘[2,1- b ]呋喃和苯并呋喃支架。