Experimental tests of the stereoelectronic effect at phosphorus: nucleophilic reactivity of phosphite esters
作者:Kazunari Taira、William L. Mock、David G. Gorenstein
DOI:10.1021/ja00337a029
日期:1984.12
Le phosphite de triethyle reagit avec le benzenesulfenate d'ethyle ou le peroxyde d'ethyle pour donner le pentaethoxyphosphorane. Par contre, le methyl-1 trioxa-3,5,8 phospha-4 bicyclo [2.2.2] octane (I) ne reagit pas avec ces electrophiles pour donner le phosphorane bicyclique attendu (II). La faible reactivite du phosphite I est due a une barriere cinetique plutot que thermodynamique car le phosphorane
Le 亚磷酸酯 de 三乙醚试剂 avec le 苯次磺酸盐 d'ethyle ou le peroxyde d'ethyle pour donner le pentaethoxyphosphorane。相反,lemethyl-1 trioxa-3,5,8 phospha-4 bicyclo[2.2.2] 辛烷 (I) ne reagit pas avec ceselectrophiles pour donner lephosphoran bicyclique attenu (II)。La faible reactivity du phosphite I est due a une barriere cinetique plutot que thermodynamique car lephosphoran II est forme a partir d'un melange equimolaire
Reaction of unsaturated compounds with ethyl benzenesulfenate and trimethylsilyl isothiocyanate
作者:N. V. Zyk、A. Yu. Gavrilova、O. A. Mukhina、A. A. Borisenko、O. B. Bondarenko、N. S. Zefirov
DOI:10.1007/s11172-010-0311-0
日期:2010.9
A new method for the synthesis of thiocyanato- and isothiocyanatoalkyl phenyl sulfides by the reaction of unsaturated compounds with ethyl benzenesulfenate and trimethylsilyl isothiocyanate has been suggested. Regio- and stereoselectivity of the reaction was studied, having taken alkenes, dienes, and alkynes as examples.
Iodosulfenylation of olefins with sulfenamides in the presence of metal iodides
作者:N. V. Zyk、E. K. Beloglazkina、S. E. Sosonyuk、M. N. Bulanov、Yu. B. Chudinov
DOI:10.1007/bf02495161
日期:2000.9
tin(iv), antimony(iii), or magnesium iodides were investigated. In the case of cage olefins, the reactions afford mixtures of 1,2-iodosulfides and diiodides, the ratio between which depends on the type of iodine-containing Lewis acid. lodosulfides were obtained in the highest yields in the reactions of cage olefins upon activation with zinc or tin(ii) iodides. In the case of olefins prone to the Wagner—Meerwein
7-Azabicyclo[2.2.1]heptadienes in electrophilic chalcogenation reactions
作者:A. Yu. Gavrilova、M. A. Nechaev、D. A. Aparshov、S. Yu. Arkhipenko、R. L. Antipin、O. B. Bondarenko、N. V. Zyk
DOI:10.1007/s11172-017-1765-0
日期:2017.3
Reactions of electrophilic chalcogenation (sulfenylation and selenenylation) of 7-azabicyclo[2.2.1]heptadiene derivatives with electron-withdrawing substituents at the nitrogen atom and the double bond were found to proceed trans-stereospecifically with the formation of 1,2-addition products, resulting from the exo-attack by the electrophile. In the case of 2-tosyl-7-azanorbornadiene, the reaction
A new method for the activation of ethyl benzenesulfenate in electrophilic addition reactions
作者:N. V. Zyk、A. Yu. Gavrilova、O. A. Mukhina、O. B. Bondarenko、N. S. Zefirov
DOI:10.1007/s11172-008-0370-7
日期:2008.12
Reactions of unsaturated compounds with the PhSOEt-SOHal2 and PhSOEt-Me3SiHal systems (Hal = Cl or Br) were proposed as a newroute to haloalkyl phenyl sulfides. With acyclic and mono- and bicyclic alkenes and dienes as examples, the regio- and stereoselectivity of the reactions were studied.