The first total synthesis of both C-11 epimers of 13-hydroxy-alpha-eud
esmol 1a and 1b by the use, as a key reaction, of the Sharpless asymme
tric dihydroxylation of alkene 7 is presented. The absolute configurat
ion of natural 13-hydroxy-alpha-eudesmol is established through compar
ison of the H-1 NMR spectrum of natural diol and synthetic diols. In o
ur synthesis another natural product (+)-alpha-selinene 2 has also bee
n accomplished. (C) 1998 Elsevier Science Ltd. All rights reserved.