Enantioselective Intramolecular Nicholas Reaction Catalyzed by Chiral Phosphoric Acid: Enantioconvergent Synthesis of Seven‐Membered Cyclic Ethers from Racemic Diols
作者:Yusuke Ota、Azusa Kondoh、Masahiro Terada
DOI:10.1002/anie.201808239
日期:2018.10.15
An enantioconvergent intramolecular Nicholas reaction of racemic diols was developed using BINOL‐ and SPINOL‐derived phosphoric acids as the chiral Brønsted acid catalyst. The developed reaction features an efficient approach to the synthesis of seven‐membered cyclic ethers in a highly enantioselective manner. Further derivatization of the enantioenriched cyclic ethers, initiated by the de‐complexation
使用BINOL和SPINOL衍生的磷酸作为手性布朗斯台德酸催化剂,开发了外消旋二醇的对映体分子内尼古拉斯反应。所开发的反应具有以高对映选择性的方式合成七元环醚的有效方法。通过二甲酚类化合物的去复合作用引发的对映体富集的环醚的进一步衍生,得到了具有不饱和二酯部分的致密官能化的环醚,而对映体过量也没有损失。