developed. A variety of eight-membered cyclic ethers with two contiguous tertiary stereocenters were obtained in high yields with excellent stereoselectivities. This reaction not only provides a new strategy for constructing enantioenriched eight-membered cyclic ethers but also demonstrates the practicability of ynones as C4-syntons for the synthesis of chiral medium-membered rings.
通过结合双功能方酰胺和
DBU催化,在原位生成的邻
喹啉甲烷和ynones之间开发了顺序对映选择性共轭加成/氢烷氧基化反应。具有高产率和优异的立体选择性,获得了具有两个连续的叔立体中心的各种八元
环醚。该反应不仅为构建对映体富集的八元
环醚提供了新的策略,而且证明了炔酮作为C4-合成子用于合成手性中元环的实用性。