Aliphatic ethers and esters of 1-(2,4-dichlorophenyl)-2-(1H-imidazolyl) ethanol: study of antifungal activity against yeasts and hydrophobic character
摘要:
Aliphatic ethers 2 and esters 3, which are closely related to antifungal azoles, were synthesized and tested against various strains of Candida. We found that their activity was strongly related to the length of the chains; the best activity was obtained with a C-6 chain for ethers and C-5 or C-6 chains for esters (including the carbonyl group), whereas shorter or longer alkyl chains decreased antifungal efficiency. The biological activity of such compounds could be related to their ability to bind with the lipophilic area near the active site of enzymatic target. The lipophilic character increases with the length of chain, following a linear variation. Thus, even if the activity depends on the lipophilic influence, this particular property is not sufficient to totally explain the antifungal efficiency.
Design and synthesis of novel imidazole derivatives as potent inhibitors of allene oxide synthase(CYP74)
作者:Keimei Oh、Noboru Murofushi
DOI:10.1016/s0968-0896(02)00422-4
日期:2002.12
series of novel imidazole derivatives and tested them in a bioassay as AOS inhibitors using a purified recombinant AOS enzyme isolated from Arabidopsis and expressed in E. coli. Among the derivatives prepared, heptyl 8-[1-(2,4-dichlorophenyl)-2-imidazolylethoxy]octanoate (k) was found to be the most potentinhibitor, with an IC(50) of 10+/-5 nM, which is 250,000-fold and 1,000,000-fold more potent than