An Expeditious Total Synthesis of Both Diastereoisomeric Lipid Dihydroxytetrahydrofurans from Notheia anomala
摘要:
Short, high yielding syntheses of both diastereomers of the naturally occurring oxylipids 1 and 2 using a combination of organocatalytic hydroxylation of an aldehyde, alkene cross metathesis, and palladium(0) catalyzed cyclization chemistry (six-step process) are reported. Furthermore, the influence of the catalyst on the cross metathesis reaction of the homoallylic 1,2-diol has been studied in detail.
Concise syntheses of 2,5-disubstituted-3-hydroxytetrahydrofurans have been developed that provide access to each configurational isomer of this scaffold from a single aldol adduct. Application of these methods to the rapid preparation of (6S,7S,9S,10S)- and (6S,7S,9R,10R)-6,9-epoxynonadec-18-ene-7,10-diol, two structurally related marine epoxylipids, is reported.