4-Hydroxypyrylium cations undergo photo-ring contraction upon irradiation of 50 percent H~SOI,. Dihydroxycyclopentenones are intermediates in these reactions. A variety of 4-hydroxypyrylium cations are known to undergo photoisomerization in concentrated H~SOI, to yield 2-hydroxypyrylium cations. la
β¦ LIBER β¦
Regio- and stereochemistry of the photo-ring contraction of 4-pyrones
β Scribed by James W. Pavlik; Steven J. Kirincich; Richard M. Pires
- Book ID
- 112129965
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1991
- Tongue
- English
- Weight
- 180 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0022-152X
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