6-p-Methoxyphenyl-3,4-dihydro-2H-pyran (III) and its 4,4-dimethyl analogue (IV) have been prepared and photo-oxidised. The mechanism of formation of the products, 4-p-anisoyloxybutyraldehyde (XVII) and 4-p-anisoyloxy-2,2-dimethybutyraldehyde (XVIII), is considered.
R. S. Atkinson, J. Chem. Soc. C, 1971, 784 DOI: 10.1039/J39710000784
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