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。
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