N-Alkynylated sulfoximines have been obtained by copper-catalyzed cross-coupling reactions starting from NH-sulfoximines and bromoacetylenes in moderate to good yields. The reaction conditions are mild, and the substrate scope is wide.
A Radical-Initiated Fragmentary Rearrangement Cascade of Ene-Ynamides to [1,2]-Annulated Indoles via Site-Selective Cyclization
作者:Sifan Li、Yu Wang、Zibo Wu、Weiliang Shi、Yibo Lei、Paul W. Davies、Wei Shu
DOI:10.1021/acs.orglett.1c02519
日期:2021.9.17
Herein, a radical triggered fragmentary cyclization cascade reaction of ene-ynamides is presented, providing a rapid access into [1,2]-annulated indoles by an intermolecular radical addition, intramolecular cyclization, desulfonylative aryl migration, and site-selective C(sp2)-N cyclization sequence. DFT calculations support oxidation of N-centered radical species to cations prior to the C–N bond formation
Photocatalytic Isomerization of Styrenyl Halides: Stereodivergent Synthesis of Functionalized Alkenes
作者:Hao Zhang、Qing Xu、Lei Yu、Shouyun Yu
DOI:10.1002/ejoc.201901119
日期:2020.3.15
An efficient and general method for the isomerization of styrenyl halides under photocatalytic conditions is reported. A series of stereospecific transformations constitute preliminary validation of this strategy in the synthesis of functionalized alkenes, including two diaryl alkenes, a styrenyl boronic ester, and an enyne.
Pd-Catalyzed Indole Synthesis via C–H Activation and Bisamination Sequence with Diaziridinone
作者:Jianjun Wang、Xiaofeng Sun、Daguo Hu、Yian Shi
DOI:10.1021/acs.orglett.1c02757
日期:2021.10.1
This work describes an efficient Pd-catalyzed indole synthesis. A wide variety of indoles can be obtained in good yields from readily available vinyl bromides. The reaction likely proceeds through a sequential aryl C–Hactivation and bisamination of a resulting pallada(II)cycle with diaziridinone.
这项工作描述了一种有效的 Pd 催化吲哚合成。可以从容易获得的乙烯基溴以良好的收率获得多种吲哚。该反应可能通过连续的芳基 C-H 活化和所得的钯 (II) 环与二氮丙啶酮的双胺化进行。
The thioamidation of <i>gem</i>-dibromoalkenes in an aqueous medium
作者:Jigarkumar K. Vankar、Ankush Gupta、Jaydeepbhai P. Jadav、Shankara H. Nanjegowda、Guddeangadi N. Gururaja
DOI:10.1039/d0ob02319a
日期:——
1-dibromoalkenes for thioamidesynthesis has been achieved in an aqueous medium. The presented green protocol emphasizes the suitability of aqueous media for the thioamidation reaction and enables greater selectivity with synthetic utility. A wide range of thioamides in moderate to excellent yields has been achieved using readily available starting materials, with the use of no organic solvents, catalysts