Synthese der natürlichen<i>R</i>-( - )Enantiomere dreier Galbanum-Harz Macrolide
作者:Hans Jürgen Bestmann、Wilfried Kellermann
DOI:10.1055/s-1994-25676
日期:——
The three macrolides 1, 2 and 3 isolated from galbanum resin were synthesized starting from Ï-bromoacetals 9. The key step is the buffered intramolecular Wittig reaction of the ylides 14 and 23 to afford the α,β-unsaturated lactones 15, 16 and 24. Hydrogenation of these lactones gives the title macrolides in (R)-configuration.