Abstract
An efficient stereoselective synthesis of the C1-C10
and C11-O14 fragments of narbonolide, have been accomplished
by using a thiazolidinonethione as chiral auxiliary. The stereocenters
at C2, C3, C4, C5, C8, and C9 in C1-C10 fragment and C12
and C13 in C11-C14 fragment were generated via asymmetric
acyl-thiazolidinethione aldol reactions whereas the stereocenter
at C6 was installed by means of Myers alkylation.
Key words
acyl-thiazolidinethione - aldol reaction - Crimmins
protocol - Myers alkylation - Tebbe reaction