Riccardin C, a nuclear receptor LXR alpha selective agonist, is an 18-membered macrocyclic bisbibenzyl isolated from several liverworts. Synthesis of riccardin C and its seven O-methylated derivatives was accomplished. The synthetic sequence highlights an intramolecular Suzuki-Miyaura coupling in the formation of the 18-membered biaryl linkage present in riccardin C. The structure-activity relationship of these compounds suggests that all of the phenolic hydroxy groups present in riccardin C are essential for the activation of LXRa. (C) 2008 Elsevier Ltd. All rights reserved.
A Corey-Seebach Macrocyclisation Strategy for the Synthesis of Riccardin C and an Unnatural Macrocyclic Bis(bibenzyl) Analogue
作者:Faisal A. Almalki、David C. Harrowven
DOI:10.1002/ejoc.201601179
日期:2016.12
A total synthesis of riccardinC has been accomplished using a Corey–Seebach reaction to effect macrocyclisation. The versatility of the strategy has also been demonstrated with a mimetic synthesis of an unnaturalbis(bibenzyl) analogue.
使用 Corey-Seebach 反应实现大环化反应,完成了 riccardin C 的全合成。非天然双(联苄)类似物的模拟合成也证明了该策略的多功能性。
Total synthesis of riccardin C and (±)-cavicularin via Pd-catalyzed Ar–Ar cross couplings
RiccardinC, a specific LXRα agonist, is a representative macrocyclic bisbibenzyl-type natural product. As part of our synthetic studies on macrocyclic bisbibenzyls, the synthesis of riccardinC and its analog cavicularin was examined. The totalsynthesis of riccardinC was accomplished via a Pd-catalyzed intramolecular Suzuki–Miyaura coupling as the key macrocyclization step. This synthetic strategy