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Treatment and prophylaxis of diseases caused by parasites, or bacteria



Treatment and prophylaxis of diseases caused by parasites, or bacteria



Official Gazette of the United States Patent & Trademark Office Patents 1228(3), Nov 16



Aromatic compounds, or prodrugs thereof, which contain an alkylating site and which are capable of alkylating the thiol group in N-acetyl-L-cysteine, in particular bis-aromatic alpha,beta-unsaturated ketones, are used for the preparation of pharmaceutical compositions or medicated feed, food or drinking water for the treatment or prophylaxis of diseases caused by microorganisms or parasites, in particular protozoa such as Leishmannia, Trypanosoma, Toxoplasma, Plasmodium, Pneumocystis, Babesia and Theileria, intestinal protozoa such as Trichormionas and Ciardia; Coccidia such as Eimeria, Isospora, Cryptosporidium; Cappilaria, Microsporidium, Sarcocystis. Trichlodina, Trichoditella, Dacihylogurus, Pseudodacthylogurus, Acantocephalus, Ichthylophtherius, Botrecephalus; and intracellular bacteria, in particular Mycobacterium, Legionella species, Listeria and Salmonella. Preferred compounds have the formula (II): Xm --Ph--C(O)--CHdbdCH--Ph--Yn, wherein each phenyl group (Ph) may be mono- or polysubstituted; X and Y designate ARH or AZ, wherein A is O, S, NH or N(C1-6 alkyl), RH designates aliphatic hydrocarbyl, and Z is H or a masking group which is decomposed to liberate AH; m is 0, 1 or 2, and n is 0, 1, 2 or 3, whereby, when m is 2, then the two X are the same or different, and when n is 2 or 3, then the two or three Y are the same or different, with the proviso that n and m are not both 0. As examples of such compounds, chalcones, e.g. licochalcone A (obtainable i.a. from batches of Chinese licorice root of Glycyrrhiza species, e.g. G. uralensis or G. inflata) as well as hydroxy, alk(en)yl, and/or alk(en)yloxy analogues thereof are active in vitro and/or in vivo against i.a. L. major and P. falciparum.

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Accession: 035980042

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