A series of α,β-unsaturated and α-bromo carboxylic acids were iden- tified as potent antimicrobial agents. The antimicrobial activity was evaluated using the broth microdilution method. All acids 1-12 exhibited a significant activity against nine laboratory control strains of bacteria and two strains of yeast Candida albicans. The tested acids were efficiently prepared by opti- mized phase-transfer-catalyzed
One-Step Conversion of Ketones to Conjugated Acids Using Bromoform
作者:V. D. Vitnik、M. D. Ivanović、Ž. J. Vitnik、J. B. Đorđević、Ž. S. Žižak、Z. D. Juranić、I. O. Juranić
DOI:10.1080/00397910802531955
日期:2009.3.25
Phase-transfer-catalyzed (PTC) reactions of ketones with bromoform and aqueous lithium hydroxide in alcoholic solvent result in the formation of α,β-unsaturated carboxylic acids. The reaction was performed at room temperature for 24 h. The corresponding conjugated acids were obtained from cyclic or aromatic ketones, whereas bromo acids were obtained from 4-oxo-piperidine-1-carboxylic acid ethyl ester (13) and 4-oxo