Direct Organocatalytic Asymmetric Approach to Baylis-Hillman-Type Products Through a Push-Pull Dienamine Platform
作者:Dhevalapally B. Ramachary、Kinthada Ramakumar
DOI:10.1002/ejoc.201100075
日期:2011.5
A general process for the asymmetric synthesis of highly substituted 3-alkyl-Hagemann's esters was achieved for the first time through organocatalytic Michael or Baylis―Hillman-type (BH-type) reaction of Hagemann's esters with β-nitrostyrenes in the presence of a catalytic amount of L-(3,5-Me 2 ) 2 DPP/ thiourea. We have discovered, for the first time, the chiral BH-type products from Hagemann's esters
首次通过 Hagemann 酯与 β-硝基苯乙烯的有机催化 Michael 或 Baylis-Hillman 型(BH 型)反应实现了不对称合成高度取代的 3-烷基-Hagemann 酯的一般方法。 L-(3,5-Me 2 ) 2 DPP/硫脲的量。我们利用推拉二烯胺平台首次发现了Hagemann's酯与β-硝基苯乙烯的手性BH型产物。