摘要:
                                Ozonolysis of vinyl ethers in the presence of alpha-diketones provided two types of products, i.e., a Baeyer-Villiger oxidation product and 3-acyl-1,2,4-trioxolane.  The evidence suggests that the latter product is labile and, therefore, the former one might be produced by decomposition of the latter.  In contrast, 1,2,4-trioxolane-3-carboxylates were stable.  As a result, ozonolysis of vinyl ethers in the presence of alpha-keto esters yielded the expected ozonides in high yield.