十字花科植物产生的最有效的抗真菌植物抗毒素是Brassilexin和sinalexin。尽管如此,十字花科病原体黄斑细小球菌(Desm。)Ces。等等 (无性阶段Phoma lingam(Tode ex Fr.)Desm。)能够对这些植物抗毒素进行解毒。为了理解和控制这些反应,研究了在黄斑狼疮中难以捉摸的黄铜胆毒素和芥子毒素的解毒途径,并将其与合成衍生物8-甲基Brassilexin和8-乙酰Brassilexin的途径进行了比较。建立了代谢中间体的化学结构,合成和抗真菌活性,包括迄今鉴定出的最极性的代谢物3-甲酰吲哚基-2-磺酸。我们的整体研究结果表明,黄铜抗毒素的第一个排毒步骤涉及其还原性生物转化为3-氨基亚甲基吲哚-2-硫酮,
Concise Syntheses of the Cruciferous Phytoalexins Brassilexin, Sinalexin, Wasalexins, and Analogues: Expanding the Scope of the Vilsmeier Formylation
作者:M. Soledade C. Pedras、Mukund Jha
DOI:10.1021/jo0479866
日期:2005.3.1
the Vilsmeierformylation to indoline-2-thiones followed by a new aqueous ammonia workup procedure. Similarly, a very concise two-pot synthesis of the phytoalexins wasalexins using sequential formylation−amination of indolin-2-ones is described. Remarkably, this novel aqueous ammonia workup allows the sequential one-pot formylation−amination, expanding substantially the scope of the Vilsmeier formylation
A Convenient Synthesis of Isothiazolo[5,4-<i>b</i>]indole (Brassilexin) via a Polyphosphoric Acid Initiated Ring Closure
作者:Michel Devys、Michel Barbier
DOI:10.1055/s-1990-26834
日期:——
Brassilexin (4), an antifungal compound previously isolated from Brassica juncea L. (Cruciferae), has been synthesized with an overall yield of 11% starting from 3-indolecarbaldehyde (1).
芸苔素(Brassilexin)(4)是一种抗真菌化合物,以前曾从十字花科植物 Brassica juncea L. 分离出来。
Strategies of Cruciferous Pathogenic Fungi: Detoxification of the Phytoalexin Cyclobrassinin by Mimicry
作者:M. Soledade C. Pedras、Francis I. Okanga
DOI:10.1021/jf980854r
日期:1999.3.1
(Rhizoctonia solani Kuhn) and blackleg [Phomalingam (Tode ex Fr.) Desm., asexual stage of Leptosphaeria maculans (Desm.) Ces. et de Not.] fungi is reported. It was established that R. solani metabolized and detoxified cyclobrassinin via the phytoalexin brassicanal A, which was further transformed into nontoxic products. Detoxification of cyclobrassinin in P. lingam avirulent isolate Unity occurred via
致病性根腐烂菌(Rhizoctonia solani Kuhn)和黑腿病(Phoma lingam(Tode ex Fr.)Desm。,十字花科黄斑狼疮(Desm。)Ces的无性繁殖期,十字花科植物抗毒素环花青素的显着代谢。等]真菌的报道。已经确定,茄尼色单胞菌通过植物抗毒素黄铜素A代谢和解毒了环孢素,并将其进一步转化为无毒产品。灵芝P. lingam无毒分离株中环花青素的解毒通过植物抗毒素黄铜素而发生,而灵芝P.毒性分离株BJ 125中的解毒则通过植物抗毒素二氧西ass素发生。描述了这三种明显不同途径的中间体的结构确定中涉及的化学及其抗真菌活性。此外,据报道,通过模仿真菌的生物转化途径,高效合成了植物抗毒素类芸苔素A和黄铜抗毒素。讨论了这些前所未有的转变的含义。
A convenient synthesis of the cruciferous phytoalexins brassicanal A and brassilexin by mimicry of a fungal detoxification pathway
作者:M. Soledade C. Pedras
DOI:10.1039/a803485k
日期:——
The cruciferous phytoalexin brassilexin 3 has been synthesized in four steps from indoline-2-thione via 3-(aminomethylene)indole-2-thione 2, a metabolic intermediate of the detoxification pathway of the phytoalexin cyclobrassinin 1; in addition, the phytoalexin brassicanal A 8 has been synthesized in two steps from 2-indolinethione.
十字花科植物抗毒素brassilxin 3是由二氢吲哚-2-硫酮通过3-(氨基亚甲基)吲哚-2-硫酮2(植物抗毒素环芸苔素1解毒途径的代谢中间体)分四个步骤合成的;此外,植物抗毒素芸苔醛 A 8 是由 2-二氢吲哚硫酮分两步合成的。
Metabolism of crucifer phytoalexins in Sclerotinia sclerotiorum: detoxification of strongly antifungal compounds involves glucosylation
作者:M. Soledade C. Pedras、Mohammad Hossain
DOI:10.1039/b604400j
日期:——
detectable antifungalactivity. The chemical characterization of all new metabolites as well as the chemistry of these processes and a facile chemical synthesis of 1-beta-D-glucopyranosylbrassilexin are reported. Overall, our results indicate that phytoalexins, strongly antifungal against S. sclerotiorum, are detoxified via glucosylation, which in turn suggests that S. sclerotiorum has acquired efficient