Synthetic approaches to the fumagillin structure have been explored. 2-Cyclohexyl-6- methy1-2-lieptene (C) has been prepared in two ways by the Wittig reaction, and also from cyclohexyl methyl ketone, vaa the Reformatsky reaction to@-cyclohexyl-pmethylacrylic acid (G); the acid chloride with diisobutylcadmium gives 2-cyclohexyl-6-methyl-2-hepten-4-one (K), and indirect reduction of the carbonyl group gives the olefin (C). The Diels-Alder ...