Total Synthesis of Diverse Tetramic Acid Bearing cis-Decalin Natural Products

被引:9
作者
Dong, Haoran [1 ]
Hu, Dachao [2 ]
Hong, Benke [1 ]
Wang, Jin [1 ]
Lei, Xiaoguang [1 ,3 ]
机构
[1] Peking Univ, Key Lab Bioorgan Chem & Mol Engn, State Key Lab Nat & Biomimet Drugs, Dept Chem Biol,Synthet & Funct Biomol Ctr,Coll Che, Beijing 100871, Peoples R China
[2] Peking Univ, Peking Univ Tsinghua Univ Natl Inst Biol Sci Joint, Sch Life Sci, Beijing 100871, Peoples R China
[3] Peking Univ, Acad Adv Interdisciplinary Studies, Peking Tsinghua Ctr Life Sci, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
Cis-Decalin; Epoxidation; Intramolecular Diels-Alder Reaction; Natural Products; Total Synthesis; INTRAMOLECULAR DIELS-ALDER; ENANTIOSELECTIVE TOTAL-SYNTHESIS; ASYMMETRIC TOTAL-SYNTHESIS; SYMMETRIC DIENE ACETALS; DOUBLE IODOETHERIFICATION; TRANSITION-STATES; CYCLOADDITION; INVOLVEMENT; EPOXIDATION; CENTERS;
D O I
10.1002/anie.202301872
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report herein the first total syntheses of four natural antibiotics, vermisporin, PF1052/AB4015-A, AB4015-L, AB4015-B, and one hydrogenated natural product derivative, AB4015-A2, that all feature a tetramic acid bearing cis-decalin ring. The construction of the functionalized cis-decalin ring was achieved by a diastereoselective intramolecular Diels-Alder (IMDA) reaction, which proceeded via a rare endo-boat transition state. Through an intramolecular neighboring-group-oriented strategy, the sterically hindered epoxy group in vermisporin, PF1052/AB4015-A and AB4015-L was installed efficiently. A one-pot aminolysis/Dieckmann condensation cascade using l-amino acid derivatives afforded the desired tetramic acid structure. The total synthesis led to the unambiguous verification of the absolute configuration of these natural products.
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页数:6
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