Bioinspired Synthesis of Platensimycin from Natural <i>ent</i>-Kaurenoic Acids
作者:Álvaro Pérez、José F. Quílez del Moral、Alberto Galisteo、Juan M. Amaro、Alejandro F. Barrero
DOI:10.1021/acs.orglett.3c01470
日期:2023.7.28
The biomimetic formal synthesis of the antibiotic platensimycin for the treatment of infection by multidrug-resistant bacteria was accomplished starting from either ent-kaurenoic acid or grandiflorenic acid, each of which is a natural compound available in multigram scale from its natural source. Apart from the natural origin of the selected precursors, the keys of the described approach are the long-distance
用于治疗多重耐药细菌感染的抗生素平板霉素的仿生正式合成是从对映贝壳杉烯酸或大花烯酸开始完成的,这两种酸都是来自其天然来源的多克规模的天然化合物。除了所选前体的天然来源外,所述方法的关键是对映贝壳杉烯酸在 C11处的长距离官能化以及二萜框架 A 环降解的有效方案。
Synthesis, cytotoxicity and antiplasmodial activity of novel ent -kaurane derivatives
作者:Ronan Batista、Pablo A. García、María Angeles Castro、José M. Miguel del Corral、Nivaldo L. Speziali、Fernando de P. Varotti、Renata C. de Paula、Luis F. García-Fernández、Andrés Francesch、Arturo San Feliciano、Alaíde B. de Oliveira
DOI:10.1016/j.ejmech.2012.12.010
日期:2013.4
This paper reports on the syntheses and spectrometric characterisation of eleven novel ent-kaurane diterpenoids, including a complete set of H-1, C-13 NMR and crystallographic data for two novel ent-kaurane diepoxides. Moreover, the antineoplastic cytotoxicity for kaurenoic acid and the majority of ent-kaurane derivatives were assessed in vitro against a panel of fourteen cancer cell lines, of which allylic alcohols were shown to be the most active compounds. The good in vitro antimalarial activity and the higher selectivity index values observed for some ent-kaurane epoxides against the chloroquine-resistant W2 clone of Plasmodium falciparum indicate that this class of natural products may provide new hits for the development of antimalarial drugs. (C) 2013 Elsevier Masson SAS. All rights reserved.
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