The full details of mechanistic investigation on enantioselective sulfenofunctionalization of alkenes under Lewis base catalysis are described. Solution spectroscopic identification of the catalytically active sulfenylating agent has been accomplished along with the spectroscopic identification of putative thiiranium ion intermediates generated in the enantiodetermining step. The structural insights gleaned from these studies informed the design of new catalyst architectures to improve enantioselectivity. In addition, structural modification of the sulfenylating agents had a significant and salutary effect on the enantioselectivity of sulfenofunctionalization which was demonstrated to be general for trans disubstituted alkenes. Whereas electronic modulation had little effect on the rate and selectivity, steric bulk on arylsulfenylphthalimides was very beneficial.

中文翻译：

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Lewis碱催化烯烃的对映选择性磺基官能化的结构，机理，光谱学和制备性研究。

刘易斯条件下烯烃对映选择性磺基官能化机理研究的全部细节描述了碱催化。催化活性的亚磺酰化剂的溶液光谱鉴定与对映体确定步骤中产生的推定的硫鎓离子中间体的光谱鉴定已经完成。从这些研究中获得的结构见解为改进对映选择性的新型催化剂结构的设计提供了参考。另外，亚磺酰化剂的结构改性对磺基官能化的对映选择性具有显着的有益作用，这被证明对于反式二取代烯烃是普遍的。尽管电子调制对速率和选择性几乎没有影响，但芳基亚硫基邻苯二甲酰亚胺的空间体积非常有益。