Chiral 2-formyl and 2-(1-oxoalkyl)-1,3-dioxolanes have been prepared b
y ozonolysis of the corresponding alkenes and by oxidation of 2-(1-hyd
roxyalkyl)-1,3-dioxolanes, which are readily available from 2-(tributy
lstannyl)dioxolanes, and taken through to alpha beta-unsaturated ester
s by condensation with stabilized ylids. The -bis(ethoxycarbonyl)-1,3-
dioxolan-2-yl]-2-pyridone 47 was prepared as an analogue of a (C)under
-bar-nucleoside, but was found to be unstable. (C) 1997 Elsevier Scien
ce Ltd. All rights reserved.