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The photochemical rearrangement of 2,5-diphenyloxazole

โœ Scribed by Masaharu Kojima; Minoru Maeda

Publisher
Elsevier Science
Year
1969
Tongue
French
Weight
133 KB
Volume
10
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

Recently, it has been reported that the five-membered heterocyclic compounds containing two vicinal hetero-atoms interchanged their positions to 1,3-systems as a common mode of reaction when irradiated with ultraviolet light.

Examples include the photo-induced rearrangement of indazoles to benzimidazoles(Z), pyrazole to imidazole(2), 3,5-diphenylisoxazole to 2,5-diphenyloxazole(3), benzisoxazoles to benzoxazoles(4), and 1,3,5-trimethylpyrazole to 1,2,4-trimethylimidazole(5).

On the other hand, there is no record of the rearrangement of 1,3-to 1,2system.

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