Formal Syntheses of (±)-Platensimycin and (±)-Platencin via a Dual-Mode Lewis Acid Induced Cascade Cyclization Approach
作者:Lizhi Zhu、Congshan Zhou、Wei Yang、Shuzhong He、Gui-Juan Cheng、Xinhao Zhang、Chi-Sing Lee
DOI:10.1021/jo401105q
日期:2013.8.16
efficient dual-mode Lewis acid induced Diels–Alder (DA)/carbocyclization cascade cyclization reaction has been developed for construction of the tricyclic core of ent-kaurenoids in one pot with the aid of a theoretical study on the π,σ-Lewis acidities of a variety of Lewis acids. With ZnBr2 as the dual-mode Lewis acid, a series of substituted enones and dienes underwent DA/carbocyclization cascade cyclization
诱导的狄尔斯-阿尔德(DA)的温和和有效的双模路易斯酸/ carbocyclization级联环化反应已被用于建筑的三环核心的开发耳鼻喉科-kaurenoids一锅与理论研究对π的辅助下,σ-各种路易斯酸的路易斯酸度。以ZnBr 2为双模路易斯酸,一系列取代的烯酮和二烯在室温下顺利进行了DA /碳环化级联环化反应,并在一锅中提供了高收率和高非对映选择性的三环环化产物。三环环化产物已成功地用作(±)-Platensimycin和(±)-platencin形式合成的常用中间体。