(+)-Fusarisetin A属于一组具有潜在抗癌活性的酰基四酸天然产物。Equisetin是一种与生物遗传相关的酰基四酸,它包含(+)-fusarisetin A的基本骨架。我们提出了Equisetin和(+)-fusarisetin A共有一种生物合成途径,该途径从天然存在的(S)-丝氨酸和不饱和脂肪开始酸。为支持该假设,我们证明了涉及分子内Diels-Alder反应的环化序列,随后是聚烯酰氨基酸的Dieckmann环化,产生了equsetin。Mn III / O 2促进的马鞭草蛋白酶的好氧氧化 或通过可见光化学产生的活性氧(ROS)产生的过氧化富铁链霉菌素,可以很容易地还原为(+)-富沙糖链菌素A。
Enantioselective total synthesis of (−)-equisetin using a Me3Al-mediated intramolecular Diels–Alder reaction
作者:Kumiko Yuki、Mitsuru Shindo、Kozo Shishido
DOI:10.1016/s0040-4039(01)00217-9
日期:2001.3
An efficient and enantioselective total synthesis of (−)-equisetin 1 has been accomplished using a diastereoselective Me3Al-mediated intramolecularDiels–Alder (IMDA) reaction as a key reaction step.
We here report that the biosynthesis of equisetin, a fungal tetramate natural product with potent anti-infectious activity, relies on Fsa2, a Diels-Alderase that constructs the trans-decalin system of the molecule...
Equisetin and a novel opposite stereochemical homolog phomasetin, two fungal metabolites as inhibitors of HIV-1 integrase
作者:Sheo B. Singh、Deborah L. Zink、Michael A. Goetz、Anne W. Dombrowski、Jon D. Polishook、Daria J. Hazuda
DOI:10.1016/s0040-4039(98)00269-x
日期:1998.4
Integration is an essential step in HN replication and is catalyzed by an enzyme called integrase. We have isolated equisetin (la), and a novel opposite stereochemical homolog, phomasetin (2a), from Fusarium heterosporum and a Phoma sp. respectively. They inhibit the invitro recombinant integrase enzyme with IC50 values of 7-20 mu M. Unlike known inhibitors, these compounds also inhibit the integration reactions catalyzed by preintegration complexes isolated from HIV-I infected cells. (C) 1998 Elsevier Science Ltd. All rights reserved.
Characterization of the Fusarium toxin equisetin: the use of phenylboronates in structure assignment
作者:N. J. Phillips、J. T. Goodwin、A. Fraiman、R. J. Cole、D. G. Lynn
DOI:10.1021/ja00203a025
日期:1989.10
TUROS, EDWARD;AUDIA, JAMES E.;DANISHEFSKY, SAMUEL J., J. AMER. CHEM. SOC., 111,(1989) N1, C. 8231-8236
作者:TUROS, EDWARD、AUDIA, JAMES E.、DANISHEFSKY, SAMUEL J.