Chemical analysis of a terrestrial-derived Streptomyces sp. Lv20–195 cultivated from the root zone of Olea europea yielded oleaceran, 1, possessing a novel spiro[isobenzofuran-1,2′-naptho[1,8-b,c]furan] carbon skeleton. The structure of 1 was determined by detailed spectroscopic analysis.
Racemic Total Synthesis of Elmonin and Pratenone A, from <i>Streptomyces</i>, Using a Common Intermediate Prepared by <i>peri</i>-Directed C–H Functionalization
作者:Michiel T. Uiterweerd、Adriaan J. Minnaard
DOI:10.1021/acs.orglett.2c03449
日期:2022.12.30
The first total synthesis of elmonin and pratenone A, two complex rearranged angucyclinones from Streptomyces, is reported. Using peri-directed C–H functionalization, the key naphthalene fragment present in both synthetic targets was efficiently prepared. Coupling to two anisole-derived fragments gave access to the natural products, in which elmonin was prepared using a biomimetic spiro-ketalization