Asymmetric Synthesis of Rauhut–Currier type Products by a Regioselective Mukaiyama Reaction under Bifunctional Catalysis
作者:María Frias、Rubén Mas-Ballesté、Saira Arias、Cuauhtemoc Alvarado、José Alemán
DOI:10.1021/jacs.6b07851
日期:2017.1.18
The reactivity and the regioselective functionalization of silyl-diene enol ethers under a bifunctional organocatalyst provokes a dramatic change in the regioselectivity, from the 1,5- to the 1,3-functionalization. This variation makes possible the 1,3-addition of silyl-dienol ethers to nitroalkenes, giving access to the synthesis of tri- and tetrasubstituted double bonds in Rauhut-Currier type products
在双功能有机催化剂下,甲硅烷基二烯烯醇醚的反应性和区域选择性官能化引发了区域选择性的巨大变化,从 1,5- 到 1,3-官能化。这种变化使甲硅烷基二烯醇醚与硝基烯烃的 1,3-加成成为可能,从而可以在 Rauhut-Currier 型产品中合成三取代和四取代双键。该过程在平稳条件、非阴离子条件和高对映体过量条件下进行。基于 DFT 和机械实验,提出了一种合理的机械途径。