Efficient Synthesis of Episulfones and of SO<sub>2</sub> with Any Variation of Oxygen Isotopes Using HOF·CH<sub>3</sub>CN
作者:Tal Harel、Elizabeta Amir、Shlomo Rozen
DOI:10.1021/ol060087e
日期:2006.3.1
successfully employed in converting episulfides to episulfones. Unlike other oxidizing agents, no episulfoxides were formed under standard conditions. Reacting H(18)OF.CH(3)CN with either an episulfide or an episulfoxide leads to the corresponding episulfone with all combinations of oxygen isotopes. Decomposition of such episulfones gives any desirable variation of S(18)O(x)()O (x = 16, 18).
Symmetrische alkene über episulfone aus primären sulfonylchloriden
作者:Günter Opitz、Thomas Ehlis、Karlheinz Rieth
DOI:10.1016/s0040-4039(00)99182-2
日期:——
Primary sulfonyl chlorides RCH2SO2Cl(R= Alk or Ar) react with triethylamine in acetonitrile solution at −40°C to give mixtures of cis- and trans-2,3-disubstituted thiirane-1,1-dioxides which can be thermolyzed to the corresponding Z- and E-alkenes.
伯磺酰氯RCH 2 SO 2 Cl(R = Alk或Ar)在乙腈溶液中于-40°C与三乙胺反应,制得顺式和反式-2,3-二取代的噻喃-1,1-二氧化物的混合物,可以是热解为相应的Z和E烯烃。
The first preparation of episulfones from episulfides: Oxidation using oxone®/trifluoroacetone
作者:Paul Johnson、Richard J.K. Taylor
DOI:10.1016/s0040-4039(97)01307-5
日期:1997.8
For the first time, episulfones have been prepared by oxidation of the corresponding episulfides. Seven examples are given, most of which proceed in good to excellent yield. The first oxidation of an episulfoxide to an episulfone is also reported as part of a preliminary mechanistic study.
Observed and calculated <sup>1</sup>
H and <sup>13</sup>
C chemical shifts induced by the <i>in situ</i>
oxidation of model sulfides to sulfoxides and sulfones
quantum chemical calculations have been tested to reproduce the observed (1)H and (13)C chemicalshifts of the starting sulfides and their oxidation products. It has been shown that the determination of the energy-minimized conformation is a very important condition for obtaining realistic data in the subsequent calculation of the NMR chemicalshifts. The correlation between calculated and observed chemical
Novel Episulfone Substitution and Ring-Opening Reactions via α-Sulfonyl Carbanion Intermediates
作者:Nigel S. Simpkins
DOI:10.1080/10426509708545519
日期:1997.1.1
Three-membered cyclic sulfones undergo substitution on treatment with baseelectrophile mixtures, such as LDA-Me3SiCl and tBu-P4-phosphazene base-PhCHO, to give either substituted episulfones or the corresponding alkenes following loss of SO2. In the absence of Me3SiCl, reaction of episulfones with LDA results in ring-opening to give alkenyl sulfinate intermediates, which can be alkylated to give (E)-alkenyl