Pd(II)/β-ICD-Cocatalyzed Asymmetric Route to Oxindole Scaffold via Cascade Reaction of Diazoacetamides and MBH-Carbonates
作者:Yang Yang、Chaoqun Ma、Nilesh J. Thumar、Wenhao Hu
DOI:10.1021/acs.joc.6b01703
日期:2016.9.16
report an efficient method for asymmetric synthesis of chiral oxindoles. Allyl palladium(II) chloride dimer (APC)-catalyzed, in combination with β-isocupreidine (β-ICD)-cocatalyzed, reaction of diazoacetamide with Morita–Baylis–Hillman (MBH) carbonates proves to be a facile protocol to access multifunctional oxindoles bearing a C-3 quaternary stereo center. This tandem reaction tolerates a wide variety of
我们报告了不对称合成手性羟吲哚的有效方法。烯丙基氯化钯(II)二聚体(APC)催化,与β-异iso啶(β-ICD)共同催化,重氮乙酰胺与Morita-Baylis-Hillman(MBH)碳酸酯的反应被证明是一种容易获得多功能羟基吲哚的方案带有一个C-3四元立体中心。该串联反应可容忍两个芳环上的多种官能团。这种方法以50-75%的收率提供了多种手性羟吲哚,在大多数情况下其最高可达95:5 dr,最高可达93:7 er。