Macrocycles by ring-closing-metathesis, XI: Syntheses of (R)-(+)-lasiodiplodin, zeranol and truncated salicylihalamides
作者:Alois Fürstner、Günter Seidel、Nicole Kindler
DOI:10.1016/s0040-4020(99)00302-6
日期:1999.7
Concise, flexible and high yielding approaches to the orsellinic acid type macrolides lasiodiplodin 1 and zeranol 3 are described which involve only metal-assisted or metal-catalyzed CC-bond formations. Key steps are the efficient allylation of aryl triflates 14 and 25 either by Stille or by modified Suzuki coupling reactions, and the high yielding ring closure of the macrocyclic rings by RCM using
描述了一种简单,灵活且高产的方法,以奥数酸为基础的大环内酯类拉索二倍体1和麦角醇3仅涉及金属辅助或金属催化的CC键形成。关键步骤是通过Stille或通过改进的Suzuki偶联反应有效地芳基三氟甲磺酸酯14和25烯丙基化,以及使用钌卡宾18作为催化剂通过RCM高效合成大环的环。合成中间体之一,即环烯烃16,也可以视为有效的抗肿瘤剂水杨酰卤酰胺A 7的截短类似物。从16的体外细胞毒性数据,可以推断出水杨酰卤酰胺的结构/活性关系的初步见解。