首页> 外文期刊>RSC Advances >Protecting group-directed annulations of tetra-substituted oxindole olefins and sulfur ylides: regio- and chemoselective synthesis of cyclopropane- and dihydrofuran-fused spirooxindoles
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Protecting group-directed annulations of tetra-substituted oxindole olefins and sulfur ylides: regio- and chemoselective synthesis of cyclopropane- and dihydrofuran-fused spirooxindoles

机译:四取代的羟吲哚烯烃和硫醚的保护基导向的环空:环丙烷和二氢呋喃稠合的spirooxindoles的区域和化学选择性合成

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Protecting group-controlled annulations of tetra-substituted oxindole olefins and sulfur ylides have been achieved for the synthesis of multifunctional cyclopropane- and dihydrofuran-fused spirooxindoles. Under precise annulation regulation, a variety of cyclopropane- and dihydrofuran-fused spirooxindoles containing vicinal quaternary carbon centers were produced in up to 90% yield with up to 20?:?1 dr. This reaction demonstrates high regio-, chemo- and diastereoselectivity, broad functional group tolerance and gram-scale capacity.
机译:为了合成多功能环丙烷和二氢呋喃稠合的螺硫醇,已经实现了四取代的羟吲哚烯烃和硫醚的保护基控制的环化反应。在精确的环形调节下,可以生产出含有邻位季碳中心的各种环丙烷和二氢呋喃熔合的螺硫醇,产率高达90%,产率高达20?:?1 dr。该反应显示出高的区域,化学和非对映选择性,宽泛的官能团耐受性和克级能力。

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