Silicananoparticles as a reusable catalyst: a straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts under neutral reaction conditions
作者:Subhash Banerjee、Jayanta Das、Richard P. Alvarez、Swadeshmukul Santra
DOI:10.1039/b9nj00399a
日期:——
A simple and straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts has been demonstrated using silica nanoparticles (NPs) as a reusable catalyst via the 1,2-addition of thiols to alkenes, alkynes and alkyl/acyl halides, and the 1,4-addition of thiols to conjugated alkenes at room temperature.
The highlyselective anti‐Markovnikov addition of thiols to unactivated alkenes and alkynes was demonstrated by using 3,4‐dimethyl‐5‐vinylthiazolium iodide or its polymer, poly(3,4‐dimethyl‐5‐vinylthiazolium) iodide, as a complementary catalyst. The reaction proceeded cleanly under base‐free conditions in air with both aromatic and aliphatic thiols. The polymer catalyst showed a high turnover number
Scandium(III) triflate promoted highly selective addition of thiols to functionalizedolefins under mild conditions. The addition follows anti-Markovnikov regioselectivities, which are unusual for Lewis acids-catalyzed hydrothiolation. This reaction marks broad functional groups tolerance, which opens a beneficial synthetic route to functionalized and biologically active thio-compounds. This method
Electroreductive Nickel‐Catalyzed Thiolation: Efficient Cross‐Electrophile Coupling for C−S Formation
作者:Nate W. J. Ang、Lutz Ackermann
DOI:10.1002/chem.202005449
日期:2021.3.12
are of utmost topical importance towards the effective development of pharmaceuticals and functional materials. Herein, we present an efficient and mild electrochemical thiolation by cross‐electrophilecoupling of alkyl bromides with functionalized bench‐stable thiosulfonates to access alkyl sulfides with excellent efficacy and broad functional group tolerance. Cyclic voltammetry and potentiostatic
Indium(I) iodide promoted cleavage of dialkyl/diaryl disulfides and subsequent anti-Markovnikov addition to styrenes: a new route to linear thioethers
作者:Brindaban C. Ranu、Tanmay Mandal
DOI:10.1016/j.tetlet.2006.07.017
日期:2006.9
The reaction of thiolate anions, generated in situ by indium(I) iodide promoted cleavage of dialkyl/diaryl disulfides, with styrenes has been investigated. Thiolate anions add to a variety of styrenes in an anti-Markovnikov manner producing linear thioethers in high yields. This method provides a new route to the synthesis of thioethers.