Photochemical Dehydrogenation of 3-Acetyl-3,4-dihydrocoumarin

Article abstract of DOI:10.1007/BF00810299

The ultraviolet irradiation of air-saturated alcoholic solutions of 3-acetyl-3,4-dihydrocoumarin (1) leads to the formation of 3-acetylcoumarin (2) and 3,3'-diacetyl-3,3',4,4'-tetrahydro-4,4'-biscoumarin (3).The presence of molecular oxygen is an indispensable condition for the occurence of a photodehydrogenation process, which is quantitatively when effected on silica gel.