An efficient degradation and resynthesis of anguidine that pivots around norketone 4 is described. The sequence from anguidine to anguidine via 4 proceeds in 12 steps with an overall yield of 30%. This work has permitted for the first time the preparation of an enantiomerically pure, high specific activity I4C-labeled epoxytrichothecene mycotoxin required for biological investigations. The radiolabel was introduced by the reaction of 4 ...