PREPARATION OF USEFUL SYNTHETIC INTERMEDIATES OF TAXOL ANALOGS, CYCLOOCTENONE DERIVATIVES

Abstract

Stereoselective syntheses of ω-(α-bromoketo) octanals and nonanal with oxygenated functions and formation of the corresponding eight-membered carbocyclic aldols by subsequent samarium(II)-mediated cyclization are demonstrated. Cyclooctenones deoxygenated at the C2 or C10 position in the taxane framework are prepared by dehydration of the above aldols.