SYNTHESIS OF THE C1-C6 KETO-ACID SYNTHON OF THE EPOTHILONES

摘要

The present invention relates to alternative methods for producing keto-acid synthons, which are useful for the synthesis of epothilones and analogs and derivatives thereof. A general method according to the present invention broadly comprises performing aldol condensation of a first aldehyde of a general formula: (I) with a carbonyl compound in the form of a ketone or a second aldehyde having a generalized formula: (II) thereby to form a first compound having a generalized formula : (III) and thereafter converting the first compound to a protected keto-`acid synthon of generalized formula: (IV) The present invention is also directed to chemical compounds useful in the synthesis of epothilones and analogs and derivatives thereof and to methods for forming each of these chemical compounds.