Monoalkylation of natural dihydroxycoumarins was carried out by Mitsunobu dehydroalkylation under sonochemical conditions. Aesculetin (6,7-dihydroxycoumarin) was selectively alkylated in good yield with prenyl alcohols at position 7, as clearly shown by NOESY experiments; though less selectively, position 7 was also the most reactive in daphnetin (7,8-dihydroxycoumarin). The synthesis of the phytoestrogen ferujol is also reported for the first time. (C) 2003 Elsevier Ltd. All rights reserved.
Development of Amphiphilic Coumarin Derivatives as Membrane-Active Antimicrobial Agents with Potent <i>In Vivo</i> Efficacy against Gram-Positive Pathogenic Bacteria
作者:Rongcui Zhong、Haizhou Li、Hongxia Li、Shanfang Fang、Jiayong Liu、Yongzhi Chen、Shouping Liu、Shuimu Lin
DOI:10.1021/acsinfecdis.1c00246
日期:2021.10.8
Increases in drug-resistantpathogens are becoming a serious detriment to human health. To combat pathogen infections, a new series of amphiphilic coumarin derivatives were designed and synthesized as antimicrobial agents with membrane-targeting action. We herein report a lead compound, 25, that displayed potentantibacterial activity against Gram-positive bacteria, including MRSA. Compound 25 exhibited