title: Products from furans. 1. Sunthesis and anticoccidial and antimicrobial activity of 5-amino-5,6-dihydro-6-methoxy-2-methyl-2-(4'-biphenylyl)-2H-pyran-3(4H)-ones and related compounds.
abstract: A Michael type addition of an amine to 6-methoxy-2-methyl-2-(4'-biphenylyl)-2H-pyran-3(6H)-one (1) dissolved in ether, benzene, or THF gave 5-amino derivatives of 5,6-dihydro-6-methoxy-2-methyl-2-(4'-biphenylyl)-2H-pyran-3(4H)-one (2). These by subsequent reduction with LiAlH4 were converted to 5-amino derivatives of 6-methoxy-2-methyl-2-(4'-biphenylyl)tetrahydro-2H-pyran-3-ol (3). Both isomers A and B of 1 (in regard to the methoxy group at C6) were used for the synthesis of 2 and 3. The in vitro antimicrobial activity of the amine adducts 2 was of the same order of magnitude as the starting material. Amine adducts in general, however, were by far more active as coccidiostats than the starting material and retained their activities when they were reduced. 5,6-Dihydro-6-methoxy-2-methyl-2-(4'-biphenylyl)-5-(dimethylamino)-2H-pyran-3(4H)-one hydrochloride (A) and 5,6-dihydro-6-methoxy-2-methyl-2-(4'-biphenylyl)-5-(dimethylamino)-2H-pyran-3(4H)-one hydrochloride (B), prepared from isomer A and B of 1, respectively, were the most active as coccidiostats. These compounds when administered orally to chickens 1 day prior to infection at a concentration 0.05% in their diet gave them total protection against Eimeria tenella.
mesh_terms: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000138:chemical synthesis / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D003049:Coccidiostats / Q000138:chemical synthesis* / Q000494:pharmacology; D004539:Eimeria / Q000187:drug effects; D013293:Enterococcus faecalis / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects; D005663:Furans; D007711:Klebsiella pneumoniae / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D008864:Microsporum / Q000187:drug effects; D011514:Proteus vulgaris / Q000187:drug effects; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D011714:Pyrans / Q000138:chemical synthesis*; D011753:Pyrones / Q000138:chemical synthesis* / Q000494:pharmacology; D012475:Salmonella / Q000187:drug effects; D012706:Serratia marcescens / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D014249:Trichophyton / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D001713:Biphenyl Compounds; D003049:Coccidiostats; D005663:Furans; D011714:Pyrans; D011753:Pyrones