A new strategy for the transformation of terminalalkynes to branched allylic sulfones was developed. Using a Rh(I)/DPEphos/benzoic acid catalyst system, terminalalkynes react with sulfonyl hydrazides to produce branched allylic sulfones with good to excellent yields and selectivities in general.
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
SYNTHESIS OF SUBSTITUTED VINYL SULFONES VIA DEACYLATION
作者:Hiroshi Kotake、Katsuhiko Inomata、Manabu Sumita
DOI:10.1246/cl.1978.717
日期:1978.7.5
It was found that the anions of β-ketosulfones reacted with formaldehyde to give the corresponding vinyl sulfones via deacylation, which provides a new preparative method for olefinic bonds.
作者:Nikita S. Shlapakov、Andrey D. Kobelev、Julia V. Burykina、Alexander Yu. Kostyukovich、Burkhard König、Valentine P. Ananikov
DOI:10.1002/anie.202314208
日期:2024.3.22
coupling of thiols with readily available alkynes and alkenes has been developed. The reaction mechanism was evaluated by combining ESI-HRMS, EPR spectroscopy, isotope labeling and control experiments. The applicability of the reversible radicaladdition approach for intermolecular reactions and the key role of π–π stacking interactions in stereoselectivity control have been shown by DFT studies.