A new radical chain process catalysed by sulfonyl radicals has been used for the synthesis of functionalised indoles. (C) 2000 Elsevier Science Ltd. All rights reserved.
Electrochemical Oxidative Cross‐Coupling Reaction to Access Unsymmetrical Thiosulfonates and Selenosulfonates
作者:Xiaofeng Zhang、Ting Cui、Yanghao Zhang、Weijin Gu、Ping Liu、Peipei Sun
DOI:10.1002/adsc.201900047
日期:2019.4.23
The electrochemical oxidativecross‐dehydrogenativecoupling of arylsulfinic acids with thiophenols was achieved via a radical process. A wide range of arylsulfinic acids and substituted thiophenols were found to be tolerated, providing unsymmetrical thiosulfonates in good to excellent yields. This electrochemical method can also be used for the reaction of arylsulfinic acids with disulfides or diselenides
Conjugate Additions of <i>o</i>-Iodoanilines and Methyl Anthranilates to Acetylenic Sulfones. A New Route to Quinolones Including First Syntheses of Two Alkaloids from the Medicinal Herb <i>Ruta chalepensis</i>
作者:Thomas G. Back、Masood Parvez、Jeremy E. Wulff
DOI:10.1021/jo026595t
日期:2003.3.1
especially when the aniline contained an electron-withdrawing substituent such as an ester group. In some cases, the reactions were enhanced by the presence of DMAP and the use of an excess of the sulfone in aqueousDMF. N-Formylanilines proved superior to free anilines. The products were either vinyl or allyl sulfones, depending on the conditions and the structure of the reactants. The acetylenic sulfone
Organocatalytic selenosulfonylation of the C–C doublebond of α,β-unsaturatedketones to construct two contiguous stereogenic centers in an aqueous medium was described. A series of α-selenyl and β-sulfonyl ketones with various functional groups were synthesized in good yields and enantioselectivities with saturated NaCl solution as the solvent. In addition, this protocol had been successfully scaled
Visible-light-driven radical 1,3-addition of selenosulfonates to vinyldiazo compounds
作者:Weiyu Li、Lei Zhou
DOI:10.1039/d1gc02036f
日期:——
radical 1,3-selenosulfonylation of vinyldiazo compounds with selenosulfonates, providing various γ-seleno allylic sulfones in good yields. This photochemical reaction was carried out at room temperature in an open flask using ethyl acetate as the solvent without any photocatalysts or additives. The control experiments corroborated that the 1,3-addition proceeded via a radical-chain propagation process. The
Oxidation of 1,1-disubstituted hydrazines with benzeneseleninic acid and selenium dioxide. Facile preparation of tetrazenes
作者:Thomas G. Back、Russell G. Kerr
DOI:10.1139/v82-390
日期:1982.11.1
1,1-disubstituted hydrazines were oxidized with benzeneseleninic acid in methanol, generally producing the corresponding tetrazenes in high yield. Studies of the by-products of the reaction, of the effects of protic vs. aprotic solvents, and trapping experiments suggest that N-aminonitrenes are unlikely intermediates in this oxidation. An alternative mechanism involving a Pummerer-like reaction of seleninamides