摘要
本文报道了７种新二甲基取代苯基锍盐的合成，以取代苯硫酸或苯硫醚为原料，ＮｇＢＦ４－ＣＨ３Ｉ为烷基化试剂，１，２－二氯乙烷为溶剂室温实现Ｓ－甲基化反应．用１ＨＮＭＲ技术定量产物的收率，结果表明，反应均可定量完成，产率在９８－１００％之间．详细研究了合成产物的１ＨＮＭＫ和１３ＣＮＭＲ谱，研究揭示，合成产物符合设计结构；给出了新取代基－Ｓ（ＣＨ３）２对苯环氢的１ＨＮＭＲ化学位移及对苯环碳的１３ＣＮＭＲ化学位移影响常数，解释了其１ＨＮＭＲ谱及１３ＣＮＭＲ谱吸收峰的归属．
Seven new dimethyl substituted phenyl sulfonium .salts have been synthesized in this paper.In the presence of silver tetrafluoroborate and 1,2 - dichloroethane (as solvent),the thiophenols and methyl phenyl sulfides react with methyl iodide to form dimethylsulfonium salts at ambient temperatUre.this S-methylation is quantitatively and the yield is in the range of 98%-100% by 1H NMR quantitative technique.The 1H and 13C NMR Spectra of sulfonium salts have been studied in detail.The 1H NMR chemical shifts in the position of benzene protons caused by new subsitutent -S(CH3)2 and the influence of new functional group -S(CH3)2 on the 13C NMR chemical shag positionls of nearby carbons in benzene ring are given respectively.Finally,the peaks in 1H and 13C NMR spectra of sulfonium salts are explained.
出处
《淮北煤师院学报（自然科学版）》
1996年第4期37-45,共9页
Journal of Huaibei Teachers College(Natural Sciences Edition)
