Assembly of Tetrahydropyran Derivatives from Aldehydes, Allylboronates, and Syngas by Asymmetric Relay Catalytic Cascade Reaction
作者:Lu-Lu Li、Yong-Liang Su、Zhi-Yong Han、Liu-Zhu Gong
DOI:10.1002/chem.201801197
日期:2018.5.28
An efficient synthesis of highly enantio‐enriched tetrahydropyrans from readily available aldehydes, allylboronates, and syngas has been established by multiply relay catalysis of rhodium and chiral phosphoric acid. The cascade reaction integrates the asymmetric allylboration of aldehydes and alkene hydroformylation, providing a structurally diverse range of products with different workup procedures
通过铑和手性磷酸的多重中继催化,已经建立了从易得的醛,烯丙基硼酸酯和合成气高效合成高对映体富集的四氢吡喃的方法。级联反应整合了醛的不对称烯丙基硼化和烯烃加氢甲酰化反应,从而提供了具有不同后处理程序的结构多样的产物。关键的手性结构单元的简明合成可访问除草二烯和白藜芦醇A,证明了该方法的高度合成效用。使用烯烃代替醛的级联反应也成功。