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A Photo-Favorskii Ring Contraction Reaction: The Effect of Ring Size

✍ Scribed by Kammath, Viju Balachandran; Šolomek, Tomáš; Ngoy, Bokolombe Pitchou; Heger, Dominik; Klán, Petr; Rubina, Marina; Givens, Richard S.


Book ID
118214968
Publisher
American Chemical Society
Year
2012
Tongue
English
Weight
982 KB
Volume
78
Category
Article
ISSN
0022-3263

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📜 SIMILAR VOLUMES


Photo-ring contraction reactions of 4-hy
✍ James W. Pavlik; Alfred P. Spada 📂 Article 📅 1979 🏛 Elsevier Science 🌐 French ⚖ 232 KB

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

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✍ Ronald A. Wohl 📂 Article 📅 1973 🏛 Elsevier Science 🌐 French ⚖ 194 KB

We would like to report a new general ring contraction reaction according to the following scheme (eq. l(a),R = ArSO,): The enol ether la derived from a cyclic ketone is reacted with a suitable aside leading via an intermediate unstable 6'-triazoline & to the ring-contracted imidate ester 3a.