Expedient Synthesis of Sulfinamides from Sulfonyl Chlorides
作者:Michael Harmata、Pinguan Zheng、Chaofeng Huang、Maria G. Gomes、Weijiang Ying、Kanok-On Ranyanil、Gayatri Balan、Nathan L. Calkins
DOI:10.1021/jo062296i
日期:2007.1.1
Sulfinamides were synthesized fromsulfonylchlorides using a procedure involving in situ reduction of sulfonylchlorides. The reaction is broad in scope and easy to perform.
A robust transition-metal-free one-step strategy for the synthesis of ynamides from sulfonamides and (Z)-1,2-dichloroalkenes or alkynyl chlorides is presented. This method is not only effective for internal ynamides but also amenable for terminal ynamides. Various functional groups, even the vinyl moiety, are compatible, and thus, this strategy offers the opportunity for further functionalization.
Stereoinversion of Unactivated Alcohols by Tethered Sulfonamides
作者:Paul T. Marcyk、Latisha R. Jefferies、Deyaa I. AbuSalim、Maren Pink、Mu‐Hyun Baik、Silas P. Cook
DOI:10.1002/anie.201812894
日期:2019.2.4
remains an undeveloped area of organic synthesis. Moreover, catalytic activation of this difficult electrophile with predictable stereo-outcomes presents an even more formidable challenge. Described herein is a simple iron-based catalyst system which provides the mild, direct conversion of secondary and tertiary alcohols to sulfonamides. Starting fromenantioenriched alcohols, the intramolecular variant
Iron-Catalyzed Hydroamination and Hydroetherification of Unactivated Alkenes
作者:Paul T. Marcyk、Silas P. Cook
DOI:10.1021/acs.orglett.9b00427
日期:2019.3.1
The hydrofunctionalization of alkenes, explored for over 100 years, offers the potential for a direct, atom-economical approach to value-added products. While thermodynamically favored, the kinetic barrier to such processes necessitates the use of catalysts to control selectivity and reactivity. Modern variants typically rely on noble metals that require different ligands for each class of hydrofunctionalization
Recyclable Gallium as Catalyst Precursor for a Convenient and Solvent-Free Method for the Intermolecular Addition of Sulfonamides to Alkenes
作者:Sven Doye、Daniel Jaspers、Raphael Kubiak
DOI:10.1055/s-0029-1219789
日期:2010.5
Gallium(III) iodide, which is conveniently formed in situ from gallium and iodine, is a competent catalyst for the inter- and intramolecular addition of p-toluenesulfonamides to alkenes. After each reaction, the metallic gallium can easily be recycled and used for subsequent transformations.