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Photoisomerization of 2,6-di-t-butyl-4-hydroxypyrylium cation evidence for a dewar-type intermediate

✍ Scribed by James W. Pavllk; Raymond M. Dunn

Publisher: Elsevier Science
Year: 1978
Tongue: French
Weight: 207 KB
Volume: 19
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)85815-9

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✦ Synopsis

All previously reported examples of 4-hydroxypyrylium cation photoisomerizations have been shown to follow the phototransposition patterns shown below in which substituents in the 2 and 6 positions of the reactants are found in the 4 or 5 positions of the products.

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