Catalytic, Enantioselective <i>Syn</i>-Oxyamination of Alkenes
作者:Emily M. Mumford、Brett N. Hemric、Scott E. Denmark
DOI:10.1021/jacs.1c06750
日期:2021.8.25
2-oxyamination of alkenes using selenium(II/IV) catalysis with a chiral diselenide catalyst is reported. This method uses N-tosylamides to generate oxazoline products that are useful both as protected 1,2-amino alcohol motifs and as chiral ligands. The reaction proceeds in good yields with excellent enantio- and diastereoselectivity for a variety of alkenes and pendant functional groups such as sulfonamides
Organocatalytic Direct <i>N</i>-Acylation of Amides with Aldehydes under Oxidative Conditions
作者:Chenguang Zheng、Xiang Liu、Cheng Ma
DOI:10.1021/acs.joc.7b00457
日期:2017.7.7
The direct oxidative N-acylation reaction of primary amides with aryl/α,β-unsaturated aldehydes was achieved in the presence of azolium salt C3 and an inorganic base using 3,3′,5,5′-tetra-tert-butyldiphenoquinone as the oxidant, thus providing an efficient approach for the synthesis of three types of imide compounds including N-sulfonylcarboxamides, N-sulfinylcarboxamides, and dicarboxyimides in good
Straightforward Route! [RuCl2(p‐cymene)]2 promoted amide‐directed hydroarylation of aldimines in the presence of a catalytic amount of base gives the corresponding isoindolinone derivatives. A variety of amides and saldimines participated in the present Ru‐catalyzed reaction to furnish the corresponding isoindolinones in moderate to high yield. A variety of amides and aldimines participated in the
Ruthenium(II) oxidase catalysis by direct dioxygen‐coupled turnover enabled step‐economical oxidative CH alkenylation reactions at ambient pressure. Versatile ruthenium(II) biscarboxylate catalysts displayed ample substrate scope and proved applicable to weaklycoordinating and removable directing groups. The twofold CH functionalization strategy was characterized by exceedingly mild reaction conditions
The N-tosylcarboxamide group offers the possibility of directing the Pd-catalyzedC–Harylation of arenes providing a new entry to biarylcarboxamides. Moreover, its ability to react according to different reaction conditions including intramolecularreactions makes it a pivotal directing group for a divergent synthesis of biaryl-based compounds.