A Facile Synthesis and Chemoselective Reactions of Dihydrothiouracils
摘要:
A highly efficient procedure was devised for the synthesis of 3-(3-arylthioureido)propanoic/butanoic acid and its cyclization to (3-aryl/3-aryl-6-methyl)-2-thioxotetrahydropyrimidin-4(1H)-one derivatives. Carbonyl diimidazole proved to be a very effective coupling reagent for the cyclization. Studies carried out to examine the ambident nature of the thioamide moiety towards substitution reactions demonstrated the preference for alkylation at sulfur, and acylation and 1,4-addition at nitrogen.
Synthèse, activité antiparasitaire et antifongique de thiouréines à motif aminoacide
摘要:
Sixteen compounds, close to aryl or aralkylthioureines, with a beta-alanine or gamma-aminobutyric acid chain, were synthesized for in vitro screening towards 3 types of nematodes, 8 classes of opportunist germs and 34 classes of yeasts. Their anthelminthic activity was very weak, but on the other hand, 7 compounds were effective against yeasts and/or opportunist germs, with an MIC < 50-mu-g/ml.
[EN] INHIBITORS OF UDP-GALACTOPYRANOSE MUTASE THWART MYCOBACTERIAL GROWTH<br/>[FR] INHIBITEURS DE UDP-GALACTOPYRANOSE EMPÊCHANT LA CROISSANCE MYCOBACTÉRIENNE
申请人:WISCONSIN ALUMNI RES FOUND
公开号:WO2009132310A1
公开(公告)日:2009-10-29
Compounds which inhibit microbial growth or attenuate the virulence of pathogen microorganisms. Compounds of the invention inhibit UDP-galactopyranose mutase (UGM) and have activity as inhibitors of microbial growth of microorganisms which contain this enzyme and particularly those microorganisms in which this enzyme is responsible for the incorporation of galactofuranose residues, particularly for uridine 5'-diphosphate (UDP) galactopyranose mutase. Compounds of the invention inhibit UDP- galactopyranose mutase (UGM) and have activity to attenuate virulence of pathogenic microorganisms, including mycobacteria.
Formation of 3-Substituted 2-Thio-4-oxo-hexahydro-1,3-diazines and 2-Substituted Imino-6-oxo-1,3-thiazanes from 1-Substituted 3-Carboxyethylthioureas and Interconversion of Both Cyclic Systems
作者:A. Prosen、B. Stanovnik、M. Tišler
DOI:10.1021/jo01029a503
日期:1964.6
Formation of dihydrouracils via cyclization of N-substituted 3-thioureidopropanoic acids and facile desulfurization
作者:Carina M.L. Delpiccolo、Fernando Albericio、Robert A. Schiksnis、Enrique L. Michelotti
DOI:10.1016/j.tet.2007.06.042
日期:2007.9
Cyclization of N-3 substituted 3-thioureidopropanoic acids in isobutyric anhydride at high temperature resulted in the unexpected formation of N-3, N-1-substituted dihydrouracils, as confirmed by thorough spectroscopic characterization. A mechanism based on the identification of intermediates observed at lower reaction temperatures is proposed. (C) 2007 Elsevier Ltd. All rights reserved.
Synthèse, activité antiparasitaire et antifongique de thiouréines à motif aminoacide
Sixteen compounds, close to aryl or aralkylthioureines, with a beta-alanine or gamma-aminobutyric acid chain, were synthesized for in vitro screening towards 3 types of nematodes, 8 classes of opportunist germs and 34 classes of yeasts. Their anthelminthic activity was very weak, but on the other hand, 7 compounds were effective against yeasts and/or opportunist germs, with an MIC < 50-mu-g/ml.
A Facile Synthesis and Chemoselective Reactions of Dihydrothiouracils
A highly efficient procedure was devised for the synthesis of 3-(3-arylthioureido)propanoic/butanoic acid and its cyclization to (3-aryl/3-aryl-6-methyl)-2-thioxotetrahydropyrimidin-4(1H)-one derivatives. Carbonyl diimidazole proved to be a very effective coupling reagent for the cyclization. Studies carried out to examine the ambident nature of the thioamide moiety towards substitution reactions demonstrated the preference for alkylation at sulfur, and acylation and 1,4-addition at nitrogen.