Selenosulfonation: boron trifluoride catalyzed or thermal addition of selenosulfonates to olefins. A novel regio- and stereocontrolled synthesis of vinyl sulfones
A one-pot regioselective synthetic route to vinyl sulfones from terminal epoxides in aqueous media
作者:Ruchi Chawla、Ritu Kapoor、Atul K. Singh、Lal Dhar S. Yadav
DOI:10.1039/c2gc16664j
日期:——
A highly efficient LiBr catalysed regioselective synthesis of vinyl sulfones from readily available terminal epoxides and sodium sulfinates in a one-pot procedure using water as a reaction medium is reported. The protocol is adorned with several attributes of green chemistry like recycling of the catalyst, atom-economy and an aqueous medium.
Gold-Catalyzed Intermolecular CS Bond Formation: Efficient Synthesis of α-Substituted Vinyl Sulfones
作者:Yumeng Xi、Boliang Dong、Edward J. McClain、Qiaoyi Wang、Tesia L. Gregg、Novruz G. Akhmedov、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1002/anie.201310142
日期:2014.4.25
A general method for the synthesis of α‐substituted vinyl sulfones makes use of a combination of a triazole gold complex and gallium triflate. This efficientCS bond formation between simple terminal alkynes and sulfinic acids provides access to various α‐substituted vinyl sulfones.
Convenient Methods for the Preparation of Vinylic and Allylic Sulfones from Alkenes, Haloalkanes, and Aldehydes. Stereochemistry of the Conversion of Vinylic Sulfones to the Corresponding Allylic Sulfones
1- or 2-p-Tolylsulfonyl(=tosyl)-1-alkenes, vinylic sulfones, were regioselectively prepared from 1-alkenes via iodosulfonization or sulfonylmercuration and also from 1-haloalkanes by the homologati...
Markovnikov-Selective Radical Addition of S-Nucleophiles to Terminal Alkynes through a Photoredox Process
作者:Huamin Wang、Qingquan Lu、Chien-Wei Chiang、Yi Luo、Jiufu Zhou、Guangyu Wang、Aiwen Lei
DOI:10.1002/anie.201610000
日期:2017.1.9
Direct radical additions to terminal alkynes have been widely employed in organic synthesis, providing credible access to the anti‐Markovnikov products. Because of the Kharasch effect, regioselective control for the formation of Markovnikov products still remains a great challenge. Herein, we develop a transition‐metal‐free, visible light‐mediated radical addition of S‐nucleophiles to terminal alkynes
2-p-Toluenesulfonyl(=tosyl)-1-alkenes were regioselectively prepared from 1-alkenes via iodosulfonization or sulfonylmercuration, respectively. Conversion of 1-tosyl-1-alkenes to the corresponding allylic sulfones, 1-tosyl-2-alkenes, was achieved by the treatment of their acetonitrile solution with DBU in high yield.