(−)‐Hybridalactone (1) is a marine eicosanoid isolated from the red alga Laurencia hybrida. This natural product contains cyclopropane, cyclopentane, 13‐membered macrolactone and epoxide ring systems incorporating seven stereogenic centers. Moreover, this compound has an acid‐labile skipped Z,Z‐diene motif. In this paper, we report on the totalsynthesis of (−)‐hybridalactone (1). The unique eicosanoid
for ringopening, this transformation had to be performed with complexes of the type [(Ar(3)SiO)(4)Mo≡CPh][K·OEt(2)] (43), which represent a new generation of exceedingly tolerant yet remarkably efficient catalysts. Their ancillary triarylsilanolate ligands temper the Lewis acidity of the molybdenum center but are not sufficiently nucleophilic to engage in the opening of the fragile epoxide ring. A
The stereochemistry and biosynthesis of hybridalactone, an eicosanoid from
作者:E.J. Corey、Biswanath De、Jay W. Ponder、Jeremy M. Berg
DOI:10.1016/s0040-4039(01)80088-5
日期:1984.1
The stereochemistry of the marine eicosanoid, hybridalactone, has been determined experimentally to be as in 2, in accord with a proposed scheme of biosynthesis from eicosapentaenoic acid.