1. The transformations of α-alkyl-, α-phenyl-, and α-cyclohexyltetrahydropyrans in the vapor phase on a Pt-C catalyst at 340-350° were investigated. 2. α-Alkyl- and α-phenyltetrahydropyrans not only isomerize at the C-O bond, but also undergo partial decomposition to formaldehyde and the corresponding olefin (10-20%). 3. The isomerization of α-alkyltetrahydropyrans proceeds 70% at the C-O bond not next to the side substituent, and 20% at the other C-O bond, while that of α-phenyltetrahydropyran proceeds to an extent of 60% at the bond away from it. 4. The cyclohexane ring is dehydrogenated to benzene before isomerization of the tetrahydropyran ring.
|Number of pages||3|
|Journal||Bulletin of the Academy of Sciences, USSR Division of Chemical Science|
|Publication status||Published - Apr 1964|
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