Total Synthesis of Premithramycinone H and Related Anthrapyran Antibiotics
作者:Karsten Krohn、Jürgen Vitz
DOI:10.1002/ejoc.200300451
日期:2004.1
Two approaches are described for the preparation of 2-(1′,3′-dioxoalkyl)-substituted 1-hydroxyanthraquinones 10a−d and 20a−c, which were cyclized in a biomimetic-type reaction to the anthra[1,2-b]pyran skeletons 11a−d and 21a−c of the heydamycin- or pluramycin-type antibiotics. Cleavage of the methyl ethers afforded the natural product premithramycinone H (2). The simple derivative 11b showed inhibition