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2005
Photochemistry
O 0160
Photochemical Acetalization of Carbonyl Compounds in Protic Media Using an
situ Generated Photocatalyst. — Aldehydes are found to undergo effective acetal15- 045 in
ization upon irradiation in the presence of chloranil. With ketones different results are
obtained. Some ketones such as cyclohexanone and adamantone smoothly react under
these conditions. Cycloheptanone, cyclooctanone, acetophenone, for example, do not
undergo acetalization. Sometimes, enol ethers are also formed. — (DE LIJSER*, H. J.
P.; RANGEL, N. A.; J. Org. Chem. 69 (2004) 24, 8315-8322; Dep. Chem. Biochem.,
Calif. State Univ., Fullerton, CA 92634, USA; Eng.) — Jannicke
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