By using formamides as amine sources, a novel and efficient KO-t-Bu mediated amination of sodium sulfinates has been developed. The reaction utilizes readily available starting materials under metal-free conditions, thus providing an alternative and attractive route to sulfonamides.
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.
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
Visible-light induced oxidant-free oxidative cross-coupling for constructing allylic sulfones from olefins and sulfinic acids
作者:Guoting Zhang、Lingling Zhang、Hong Yi、Yi Luo、Xiaotian Qi、Chen-Ho Tung、Li-Zhu Wu、Aiwen Lei
DOI:10.1039/c6cc04109d
日期:——
An oxidant-free dehydrogenative sulfonylation of [small alpha]-methyl-styrene derivatives was developed for the construction of allylic sulfones by using eosin Y as a photosensitizer in conjunction with a cobaloxime catalyst. The process...