The gram-scale synthesis of disesquiterpenoid ester rumphellolide J (5) from (−)-β-caryophyllene (1) and (−)-caryophyllene oxide (3) via natural products 4β,8β-epoxycaryophyllan-5-ol (2) and (+)-rumphellaoic acid A (4) is demonstrated.
Exploring the Chemical Space Accessed by Chiral Pool Terpenes. The (−)-Caryophyllene Oxide Paradigm
作者:Theodora Athanasiadou、Georgia G. Bagkavou、Polymnia Karagianni、Christos I. Stathakis
DOI:10.1021/acs.orglett.4c00132
日期:2024.4.19
Terpenes represent a flourishing source of structural motifs that can be converted into several more complex architectures. Realization of such transformations in a concise and efficient manner adds great value to the starting material. Herein, we study the case of (−)-caryophylleneoxide and convert it into natural sesquiterpenoids (rumphellolide K, rumphellaone A, and antipacid A), thus expanding
萜烯代表了结构图案的丰富来源,可以转化为几种更复杂的结构。以简洁有效的方式实现这种转变为起始材料增加了巨大的价值。在此,我们研究了(−)-石竹烯氧化物的情况,并将其转化为天然倍半萜类化合物(rumphellolide K、rumphellaone A 和 antipacid A),从而扩大了其特权结构所访问的化学空间。我们的半合成很短,并且依赖于试剂决定的立体选择性和化学选择性。
Phytotoxic Activity and Metabolism of <i>Botrytis cinerea</i> and Structure–Activity Relationships of Isocaryolane Derivatives
作者:Jociani Ascari、Maria Amélia Diamantino Boaventura、Jacqueline Aparecida Takahashi、Rosa Durán-Patrón、Rosario Hernández-Galán、Antonio J. Macías-Sánchez、Isidro G. Collado
DOI:10.1021/np3009013
日期:2013.6.28
Research has been conducted on the biotransformation Of (8S,9R)-isocaryolan-9-ol (4a) and (1S,2S,5R,8S)-8-methylene-1,4,4-trimethyltricyclo [6.2.1.0(2'5)] uridecan-12-ol (5a) by the fungal phytopathogen Botrytis cinerea. The biotransformation of compound 4a yielded compounds 6-9, while the biotransformation of compound 5a yielded compounds 10-13. The activity of compounds 4a and 5a against B. cinerea has been evaluated. (8R,9R)- Isocaryolane-8,9-diol (6), a major metabolite of compound 4a, shows activity compared to its parent compound 4a, which is inactive. The effect of isocaryolanes 3,4a, and 5a, together with. their biotransformation products 6-8, 10, and 14-17, on the germination and radicle and shoot growth of Lactuca sativa (lettuce) has also been determined. Compounds 7-13 are, described for the first time.
Novel methoxyl and hydroxyl directed pinacol rearrangements of an isocaryolane sesquiterpenoid under Mitsunobu conditions
作者:Isidro G. Collado、James R. Hanson、Rosario Hernández-Galán、Peter B. Hitchcock、Antonio J. Macías-Sánchez、Juan C. Racero
DOI:10.1016/s0040-4039(99)01335-0
日期:1999.8
Treatment of 8-methoxy-isocaryolan-9 alpha-ol (1) with acid on the one hand and with diethyl azodicarboxylate (DEAD)/triphenylphosphine on the other, leads to different pinacol rearrangements of the isocaryolane skeleton. 1S,2S,5R,9R-8-oxo-1,4,4-trimethyltricyclo[7.2.1.0(2,5)]dodecane (2), which possesses a novel sesquiterpenoid skeleton, was obtained under Mitsunobu conditions. (C) 1999 Elsevier Science Ltd. All rights reserved.