Sc(OTf)<sub>3</sub>-Catalyzed C–C Bond-Forming Reaction of Cyclic Peroxy Ketals for the Synthesis of Highly Functionalized 1,2-Dioxene Endoperoxides
作者:Haowei Feng、Yukun Zhao、Pengkang Liu、Lin Hu
DOI:10.1021/acs.orglett.1c00056
日期:2021.3.5
A new and general Sc(OTf)3-catalyzed C–C bond-forming reaction of 3-(2-methoxyethoxy)-endoperoxy ketals with silyl ketene acetals, silyl enol ethers, allyltrimethylsilane, and trimethylsilyl cyanide has been developed via the reactive peroxycarbenium ions, affording a wide range of complicated 3,3,6,6-tetrasubstituted 1,2-dioxenes bearing adjacent quaternary carbons and 3-acetyl/allyl/cyano functional
通过反应性过氧碳鎓,开发了一种新的通用的Sc(OTf)3催化3-(2-甲氧基乙氧基)-内过氧缩酮与甲硅烷基乙烯酮缩醛,甲硅烷基烯醇醚,烯丙基三甲基硅烷和三甲基甲硅烷基氰化物的C–C键形成反应。离子,在室温下以良好的收率提供了多种复杂的带有相邻季碳原子和3-乙酰基/烯丙基/氰基官能团的3,3,6,6-四取代的1,2-二恶烯。值得注意的是,所得的1,2-二氧杂环丁烷在结构上是稳定的,可以在常规加氢条件下从表面转化为另一种重要的1,2-二氧六环内过氧化物,而不会破坏弱的O-O键。