Reaction of a substituted indole-3-acetyl chloride with N-5-azidopentyl-N'-hydroxyguanidine generated a substituted 3-(5-azidopentylamino)-5-((indol-3-yl)methyl)-1,2,4-oxadiazole. Reduction of the azide with zinc and ammonium formate afforded the amine, which was elaborated to the guanidine, completing short and efficient syntheses of the cytotoxic natural products phidianidines A and B in 19% overall yield by a convergent route that will make analogues readily available for biological evaluation. Initial screening in the NCI 60 cell line at 10(-5) M indicated that the bromine on the indole is necessary for activity and that the amine precursor to phidianidine A is more potent than phidianidine A.
NEW 1,2,4-OXADIAZOL DERIVATIVES, PROCESS FOR THEIR PREPARATION AND USE THEREOF AS INTERMEDIATES IN THE PREPARATION OF INDOLIC ALKALOIDS
申请人:CONSIGLIO NAZIONALE DELLE RICERCHE
公开号:US20150051405A1
公开(公告)日:2015-02-19
The present invention relates in general terms to a variously substituted 1,2,4-oxadiazol derivative, a process for their preparation, and use thereof as an intermediate in the preparation of indolic alkaloids, including phidianidine B and A.
[EN] NEW 1, 2, 4-OXADIAZOL DERIVATIVES, PROCESS FOR THEIR PREPARATION AND USE THEREOF AS INTERMEDIATES IN THE PREPARATION OF INDOLIC ALKALOIDS<br/>[FR] NOUVEAUX DÉRIVÉS DE 1,2,4-OXADIAZOLE, LEUR PROCÉDÉ DE PRÉPARATION ET UTILISATION DE CEUX-CI COMME INTERMÉDIAIRES DANS LA PRÉPARATION D'ALCALOÏDES INDOLIQUES
申请人:CONSIGLIO NAZIONALE RICERCHE
公开号:WO2013140331A1
公开(公告)日:2013-09-26
The present invention relates in general terms to a variously substituted 1, 2, 4-oxadiazol derivative, a process for their preparation, and use thereof as an intermediate in the preparation of indolic alkaloids, including phidianidine B and A.
Design and Synthesis of Marine Phidianidine Derivatives as Potential Immunosuppressive Agents
作者:Jin Liu、Heng Li、Kai-Xian Chen、Jian-Ping Zuo、Yue-Wei Guo、Wei Tang、Xu-Wen Li
DOI:10.1021/acs.jmedchem.8b01430
日期:2018.12.27
A series of novel marine phidianidine derivatives were designed, synthesized, and evaluated for their immunosuppressiveactivities during our search of potential immunosuppressive agents with high efficacy and low toxicity from marine sources. These compounds were tested for their inhibitory activity on Con A-induced T cell and lipopolysaccharide-induced B cell proliferation. Compounds 14a and 18c