硫杂环丙烷阳离子的化学

本文综述了作者有关硫基卤与烯烃亲电加成反应机理的研究,著重探讨了其加成中产物即硫杂环丙烷的化学。桥型的硫杂环丙烷阳离子虽然作为亲电加成的中产物,并且也可在低温下制得,但可因苄基离子或叔碳离子形成的影响,而有利于异构化成为开放离子。因此,上述亲电加成由桥型离子和开放离子的平衡所决定。

The Chemistry of Thiiranium Ions

This paper reviews the author's own works related to the research on the mechanism of electrophilic addition to alkenes of sulfenyl halides, and puts emphasis upon the chemistry of thiiranium ions, which have been postulated as intermediates in the above addition reaction. The bridged thiiranium ions can be found as intermediates in some instances and can be prepared at low temperature, but of which the open ions are favored under the influence of benzylic or tertiary carbocation formation. Both stereo-and regio-chemistry ar dominated by the equilibrium between the bridged and open ions.