Formation of dihydrouracils via cyclization of N-substituted 3-thioureidopropanoic acids and facile desulfurization
摘要:
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
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.