A stereocontrolled synthesis of the C15-C27 fragment of laulimalide is desc
ribed. Key features are a divergent-convergent synthesis from (R)-glycidol,
an interesting formation of a trisubstituted double bond via ring closing
metathesis with Grubbs' ruthenium catalyst and a site selective protection
of a syn-1,2-diol. (C) 2000 Elsevier Science Ltd. All rights reserved.