Preparation of Functionalized α,β-Unsaturated Sulfonamides via Olefin Cross-Metathesis
作者:Łukasz Woźniak、Adam A. Rajkiewicz、Louis Monsigny、Anna Kajetanowicz、Karol Grela
DOI:10.1021/acs.orglett.0c01471
日期:2020.7.2
The synthesis of functionalized α,β-unsaturated sulfonamides by means of cross-metathesis of vinyl sulfonamides and olefins has been developed. The reaction proceeds smoothly in the presence of Hoveyda–Grubbs catalyst and its nitro analogue, providing a wide range of substituted products. The usefulness of this methodology has been proven in the preparation of new derivatives of biologically active
Zn/CuI-Mediated Coupling of Alkyl Halides with Vinyl Sulfones, Vinyl Sulfonates, and Vinyl Sulfonamides
作者:Matthew M. Zhao、Chuanxing Qu、Joseph E. Lynch
DOI:10.1021/jo050500g
日期:2005.8.1
A novel high-yielding Zn/CuI-mediated coupling method of alkylhalides with vinyl sulfones, vinyl sulfonates, and vinyl sulfonamides is described. This protocol is applicable for primary, secondary, and tertiary alkyl iodides and bromides. Alkyl chlorides and aryl and vinyl halides were unreactive under the reaction conditions. Formamide was found to be a superior solvent for obtaining high yields
The addition of alcohols to vinyl sulphones and sulphonamides
作者:W. G. Davies、E. W. Hardisty、T. P. Nevell、R. H. Peters
DOI:10.1039/j29700000998
日期:——
A number of mono- and di-vinyl sulphones and sulphonamides have been prepared and the kinetics of their reaction with alcohols in the presence of a basic catalyst have been studied. In a series of pure alcohols, the reaction is of the first order with respect to both vinyl compound and catalyst; its rate at first increases and then becomes practically constant on ascending the homologous series from
Synthesis of Substituted β‐Functionalised Styrenes by Microwave‐Assisted Olefin Cross‐Metathesis and Scalable Synthesis of Apremilast
作者:Anupam Jana、Grzegorz Krzysztof Zieliński、Sylwia Czarnocka‐Śniadała、Krzysztof Grudzień、Dominika Podwysocka、Marcin Szulc、Anna Kajetanowicz、Karol Grela
DOI:10.1002/cctc.201901473
日期:2019.12.5
substituted β‐functionalised styrenes by microwave‐assisted olefin cross‐metathesis (CM) is described. This method can be also employed in the synthesis of β‐deuterated α,β‐unsaturated sulfones from inexpensive allylbenzenes, though unprecedented one‐pot isomerisation/deuteration/cross‐metathesis sequence. One of such obtained CM products has been utilised in a new scalable synthesis of Apremilast
A variety of five-membered ring oxazoles have been synthesised with complete regiocontrol and without the requirement for ring oxidation via a reaction sequence based on a vinyl sulfonamide template.