作者:Anais Jolit、Cody F. Dickinson、Kei Kitamura、Patrick M. Walleser、Glenn P. A. Yap、Marcus A. Tius
DOI:10.1002/ejoc.201701117
日期:2017.11.2
The detailed account of an asymmetric Nazarov cyclization that leads to α-hydroxycyclopentenones bearing either vicinal, all-carbon atom quaternary centers, or vicinal quaternary and tertiary centers is described. The all-aliphatic examples represent the greatest challenge as the dienone starting materials are not activated toward cyclization by an aryl group. The rational design and optimization of
描述了不对称 Nazarov 环化的详细说明,该环化导致 α-羟基环戊烯酮带有邻位、全碳原子四级中心或邻位四级和三级中心。全脂肪族的例子代表了最大的挑战,因为二烯酮起始材料不会被芳基活化成环化。还描述了底物的合理设计和优化与手性布朗斯台德酸催化剂的优化以及完全取代的环戊烯酮产物的一系列非对映选择性转化。