Enantioselective Total Syntheses of Kuwanon X, Kuwanon Y, and Kuwanol A

被引:41
作者
Gao, Lei [1 ,2 ,3 ]
Han, Jianguang [3 ]
Lei, Xiaoguang [1 ,2 ,3 ,4 ,5 ]
机构
[1] Peking Union Med Coll, Grad Sch, Beijing 100730, Peoples R China
[2] Chinese Acad Med Sci, Beijing 100730, Peoples R China
[3] NIBS, Beijing 102206, Peoples R China
[4] Peking Univ, Key Lab Bioorgan Chem & Mol Engn, Beijing Natl Lab Mol Sci,Minist Educ, Coll Chem & Mol Engn,Synthet & Funct Biomol Ctr,D, Beijing 100871, Peoples R China
[5] Peking Univ, Peking Tsinghua Ctr Life Sci, Beijing 100871, Peoples R China
关键词
DIELS-ALDER REACTION; CULTIVATED MULBERRY TREE; MORUS-LHOU KOIDZ; STILBENE DERIVATIVES; NATURAL-PRODUCTS; LEWIS-ACID; STEM BARK; ALBA L; ADDUCTS; CATALYSIS;
D O I
10.1021/acs.orglett.5b03285
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The first enantioselective total syntheses of (-)-kuwanon X, (+)-kuwanon Y, and (+)-kuwanol A have been accomplished by using asymmetric Diels-Alder cyclo-addition promoted by chiral VANOL or VAPOL/boron Lewis acid. The biosynthesis-inspired asymmetric Diels-Alder cyclo-addition shows high exo selectivity (exo/endo = 13/1), which was unprecedented in the previous total syntheses of related prenylflavonoid Diels-Alder natural products. An acid catalyzed intramolecular ketalization process enabled a biomimetic transformation to construct the polycyclic skeleton of kuwanol A efficiently.
引用
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页码:360 / 363
页数:4
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