Vitispiranes, Important Constitutents of Vanilla Aroma

Abstract

Abstract The preparation of the vitispiranes 9 and 10 , identified among the volatiles of vanilla, from the theaspiranes 1 and 2 via the intermediates 4 and 5 and the allyl alcohols 7 and 8 , respectively, is described. The theaspiranes 1 and 2 can be obtained from the compounds 11–15 or 24–26 .