Herein we report an enantioselective sulfenylation of cyclic imino esters with the efficient and versatile sulfenylation reagent S-alkyl 4-methylbenzenesulfonothioates. By utilizing the Cu/tBu-Phosferrox catalytic system, we can assemble diverse S-alkyl groups into the cyclic imino esters under mild conditions in good yields and with excellent enantioselectivities. Remarkably, this method demonstrates
在此,我们报告了使用高效且通用的亚磺酰化试剂S -4-甲基苯硫代硫酸酯对环状亚氨基酯进行对映选择性亚磺酰化。通过利用 Cu/ t Bu-Phosferrox 催化体系,我们可以在温和的条件下以良好的收率和优异的对映选择性将不同的S-烷基组装成环状亚氨基酯。值得注意的是,该方法表现出对多种官能团的高度耐受性,并证明适用于药物的后期功能化。
Atom- and step-economic 1,3-thiosulfonylation of activated allenes with thiosulfonates to access vinyl sulfones/sulfides
organocatalyzed 1,3-thiosulfonylation has been developed to straightforwardly access highly functionalized vinyl sulfones, which features mild conditions, atom- and step-economy, practicability, conciseness, and environmental friendliness. Moreover, these valuable products can be transformed to vinylsulfides via a base-promoted isomerization. The versatile route can efficiently and rapidly introduce SCD3 groups
Alkynyl sulfides were shown to participate in thermal (3+2) cycloadditions with tethered alkynes. The resulting thiophenium ylide cycloadducts led to a variety of polysubstituted thiophenes by trapping with diverse electrophiles.