Dibenzothiophenes and related compounds. VI. Reactions of cyclic sulfonium salts with sodium alkoxides and benzenethiolate in alcohols.
作者:MIKIO HORI、TADASHI KATAOKA、HIROSHI SHIMIZU、MICHIHIRO MIYAGAKI、TAKASHI TAKAGI
DOI:10.1248/cpb.22.2030
日期:——
The reactions of 5-substituted dibenzothiophenium salts, having one or two substituents, with sodium alkoxides and benzenethiolate have been studied in the protic solvents. The results in Table I showed that the 5-substituted dibenzothiophenium salts with alkoxide ions mostly proceed via aromatic bimolecular nucleophilic substitution and ligand exchange as shown in Chart 7. It has been also found that the reactions of 5-substituted dibenzothiophenium salts with benzenethiolate ion support the validity of the mechanism proceed by the aromatic bimolecular nucleophilic substitution as shown in Table II.
研究了具有一个或两个取代基的 5 取代二苯并噻吩盐与烷氧基化钠和苯硫酚在质子溶剂中的反应。表 I 中的结果显示,如图 7 所示,5 取代二苯并噻吩盐与氧化烷离子的反应大多通过芳香族双分子亲核取代和配体交换进行。如表 II 所示,5-取代二苯并噻吩盐与苯硫酚离子的反应也证明了芳香族双分子亲核取代反应机理的正确性。