Synthesis and free radical scavenging activity of a novel metabolite from the fungus Colletotrichum gloeosporioides
作者:Marienca Femenía-Ríos、Carlos M. García-Pajón、Rosario Hernández-Galán、Antonio J. Macías-Sánchez、Isidro G. Collado
DOI:10.1016/j.bmcl.2006.08.071
日期:2006.11
A novel metabolite (-)-1 was isolated as its peracetylated derivative, (-)-2-(3',4'-diacetoxyphenyl)-3,4-diacetoxytetrahydrofuran (2), from a strain of the phytopathogenic fungus Colletotrichum gloeosporioides CECT 20122. The synthesis of (-)-1 was carried out by ring-closing metathesis of diene 6 and stereoselective dihydroxylation of a dihydrofuran derivative 7 as key steps. The tetraol (-)-1 showed
The natural antioxidant (−)-gloeosporiol, isolated as a peracetylated derivative from a culture of the fungus Colletotrichum gloeosporioides, has been enantioselectively prepared from 3,4-dihydroxybenzaldehyde by means of a chemoenzymatic synthesis. The key intermediate was obtained by resolution with a lipase from Pseudomonas cepacia. Its stereochemistry, initially assigned as R, according to the
A simple and an efficient strategy have been developed for the stereoselective synthesis of peracetylated (−)-gloeosporiol by acid catalysed cyclisation from the commercially available starting materials.