DBU-Promoted Tandem Cyclization of Ynones and Diazo Compounds: Direct Synthesis of Eight-Membered Cyclic Ethers
作者:Xue-Cen Xu、Yue Gong、Jie Wang、Yi-Rong Yuan、Yu-Long Zhao
DOI:10.1021/acs.orglett.3c01945
日期:2023.8.11
efficient method for the synthesis of fused eight-membered oxocino[2,3-c] pyrazoles from readily available acyclic starting materials in a single step. This reaction allows the formation of four new bonds and two rings in a highly regio- and diastereoselective manner, where two adjacent stereocenters are created simultaneously in an atom-economic manner.
开发了一种新型 DBU 促进的炔酮与重氮化合物作为 N 端亲电子试剂的串联环化反应。该反应提供了一种简单有效的方法,用于从容易获得的无环起始材料一步合成稠合八元氧辛基[2,3- c ]吡唑。该反应允许以高度区域和非对映选择性的方式形成四个新键和两个环,其中以原子经济的方式同时创建两个相邻的立体中心。