Stereoselective total synthesis of the marine sesterterpenoid (±)-palauolide
作者:Edward Piers、John S.M. Wai
DOI:10.1139/v94-023
日期:1994.1.1
A totalsynthesis of the antimicrobial, structurally unusual sesterterpenoid (±)-palauolide (1) is described. Methylenecyclohexane annulation of 3,6-dimethyl-2-cyclohexen-1-one (4) afforded a mixture of the bicyclic ketones 7 and 9 in a ratio of 94:6. Stereoselective conversion of this mixture into the phosphorodiamidate 46 was achieved via a five-step reaction sequence. Reduction of 46 with Li in
We established the stereoselective synthesis of (E)-3-methoxycarbonyl-2,4,6-trienal compound A and discovered that the compound A showed more powerful inhibitory activity toward phospholipaseA2(PLA2) from bovine pancreas than manoalide which is a typical PLA2 inhibitor. As the inhibitory mechanism of PLA2 by A, the irreversible formation of dihydropyridine derivative resulting from the reaction of