Microbial Hydroxylation and Methylation of Genistein by Streptomycetes
摘要:
Streptomyces griseus (ATCC 10137) and Streptomyces catenulae (ATCC 23893) were used to convert genistein-5,7,4'-trihydroxyisoflavone (1)-a major isoflavone found in soybeans, into five metabolites, four of which were previously unknown. These were 5,7,3',4'-tetrahydroxy-8-methylisoflavone (5), 5,7,3',4'-tetrahydroxy-8-methylisoflavanone (4), 5,7,4'-trihydroxy-3'-methoxyisoflavone (5), 5,7,8,3',4'-pentahydroxyisoflavone (7), and the known compound, 5,7-dihydroxy-3',4'-dimethoxyisoflavone (6). Identities of these metabolites were established by HRFABMS and 1D and 2D NMR correlation spectroscopy.
Preparation of prodrugs for selective drug delivery
申请人:Mills L. Randell
公开号:US20050080260A1
公开(公告)日:2005-04-14
Synthesis of a chemical compound having the formula A-B-C that may serve for applications such as drug delivery where A is a chemiluminescent, moiety, B is a photochromic moiety, and C is a biologically active moiety where A-B-C may serve as a prodrug. Novel synthetic methods of the present invention to form the prodrug comprised the steps of (1) forming a benzophenone, (2) forming a diaryl ethylene, (3) attaching a phthalimide moiety to at least one of the aryl groups of the ethylene to form a phthalimide-ethylene conjugate, (4) condensing two ethylene-phthalimide conjugates to form a phthalimide-pentadiene conjugate, (5) converting the phthalimide to the phthalhydrazide by reaction with hydrazine to form a carrier compound according to the present invention, and (6) reacting the carrier compound with an nucleophilic moiety of the drug to form the corresponding prodrug. Alternatively the carrier can be prepared by using the halo-substituted diaryl ethylene to make the corresponding cationic leuco dye-like compound with known methods. The cationic compound then is protected by reacting with a nucleophile and coupled with the aminophathalimide by palladium-catalyzed amination to form the protected phthalimide-pentadiene conjugate. The latter is refluxed with hydrazine to convert its phthalimide to the phthalhydrazide and acidified to give the carrier. An additional aspect of the present invention relates to the use of these compounds as antiviral agents for the treatment of viral infections such as HIV and as anticancer agents for the treatment of cancers such as bowel, lung, and breast cancer.
[EN] LUMINIDE AND MACROLUMINIDE CLASS OF PHARMACEUTICALS
申请人:MILLS, Randell, L.
公开号:WO1989009833A1
公开(公告)日:1989-10-19
(EN) A broad class of pharmaceutical agents which react directly with electron carriers or with reactive species produced by electron transport to release a pharmacologically active molecule to effect a therapeutic functional change in the organism by a receptor or nonreceptor mediated action.(FR) On a mis au point une large catégorie d'agents pharmaceutiques réagissant directement avec des porteurs d'électrons ou avec des espèces réactives produites par transport d'électrons, pour libérer une molécule pharmacologiquement active, afin d'effectuer un changement fonctionnel thérapeutique dans l'organisme par une action provoquée par un récepteur ou sans récepteur.