Search results for "Acetic acid solution"
showing 2 items of 2 documents
Synthesis and anti-staphylococcal activity of new 4-diazopyrazole derivatives.
2012
Abstract Several new 4-diazopyrazole derivatives 6a – g and 9a – c were obtained by the reaction of 1-(R-substituted-phenyl)-3-(1,3-dimethyl-1 H -pyrazol-5-yl)ureas 5a – g and N -(1,3-dimethyl-1 H -pyrazol-5-yl)-2-(R-substituted-phenyl)acetamides 8a – c respectively with a sevenfold excess of nitrous acid in acetic acid solution. The compounds were assayed for their activity against the Staphylococcus aureus reference strains ATCC 25923, ATCC 29213 and ATCC 6538, as well as six veterinary strains. The best anti-staphylococcal profile was showed by [(R-substituted-phenyl)acetyl](4-diazonio-1,3-dimethyl-1 H -pyrazol-5-yl)azanides 9a , c . Compound 9c was also able at 3.1 μg mL −1 to inhibit o…
Die stufenweise Syntheseo,o?-methylenverbr�ckter Cyclohexamerer mitp-Kresol- oderP-Kresol- und 4-tert-Butylphenol-Bausteinen Vergleich mit �hnlich st…
1981
Two phenolic alcohols with six phenolic units in their molecules have been obtained by stepwise syntheses starting from simple phenolic derivatives. The phenolic alcohols were cyclized in a one step cyclization by boiling in a very diluted acetic acid solution. A two step cyclization of a phenolic alcohol with three phenolic units to a cyclohexamer proceeds only with poor yields. The cyclic compounds were compared with chainlike oligomers containing six phenolic units in their molecules.