The present paper records the isolation, proof of structure, some chemical reactions and the rearrangement of the epoxyether, 1, 2-diphenyl-l-methoxyethylene oxide (I), from desyl chloride (11) and sodium methoxide. The liquid previously assigned the structure of the epoxyether3 (I) was shown to be mainly benzoin dimethyl ketal (111), the compound assigned the structure of diphenylacetylene oxide3 (IV) was shown to be the methyl ether ...