Ruthenium-Catalyzed Alder Ene Type Reactions. A Formal Synthesis of Alternaric Acid
作者:Barry M. Trost、Gary D. Probst、Andreas Schoop
DOI:10.1021/ja981540n
日期:1998.9.1
by involving Pd-catalyzed cross-coupling and asymmetric dihydroxylation. The ruthenium-catalyzed coupling proceeds best in the absence of alcohol protecting groups to maximize regioselectivity. The examples of this addition illustrated herein help elucidate some of the important factors controlling regioselectivity. They also illustrate the excellent chemoselectivity. T...
Alternaric acid 是一种纳摩尔真菌萌发抑制剂,以 1,4-二烯为代表,由末端亚甲基和 (E)-1,2-二取代烯烃组成。合成含有这种功能的天然产物的新策略源于钌催化末端烯烃与末端炔烃的加成。炔底物 4-戊炔酸是可商购的或可以通过乙酸叔丁酯的烷基化分两步制备。烯烃底物由市售的(S)-2-甲基-1-丁醇制备。该合成涉及通过涉及 Pd 催化的交叉偶联和不对称二羟基化来形成几何定义的三取代烯烃。钌催化偶联在没有醇保护基团的情况下进行得最好,以最大限度地提高区域选择性。这里说明的这种添加的例子有助于阐明控制区域选择性的一些重要因素。它们还说明了优异的化学选择性。天...