Asymmetric Organocatalytic Formal Alkynylation and Alkenylation of α,β-Unsaturated Aldehydes
作者:Martin Nielsen、Christian Borch Jacobsen、Márcio W. Paixão、Nicole Holub、Karl Anker Jørgensen
DOI:10.1021/ja903920j
日期:2009.8.5
stereoselective organocatalytic one-pot protocol for the formal alkynylation and alkenylation of alpha,beta-unsaturated aldehydes using novel chemistry based on beta-keto heterocyclic sulfones is presented. The organocatalytic step is catalyzed by a prolinol derivative and allows for the formation of important optically active compounds. Further transformations of the beta-keto heterocyclic sulfone moiety,
提出了一种使用基于 β-酮杂环砜的新型化学方法对 α、β-不饱和醛进行正式炔基化和烯基化的高度立体选择性有机催化一锅法。有机催化步骤由脯氨醇衍生物催化,并允许形成重要的光学活性化合物。基于 Smiles 重排的新发展,通过与 Julia-Kocienski 反应平行的过程,对 β-酮杂环砜部分进行了进一步的转化,产生了 β-炔基化醛和 3-链烯基化醇。各种光学活性炔烃和烯烃的合成证明了这两种转化的范围。此外,还进行了醛和醇官能度的不同转化。最后,