Photochemical Cycloisomerizations via 7-exo-dig Reactions on a Calix[4]arene Scaffold
- 9 May 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Organic Chemistry
- Vol. 72 (12) , 4532-4535
- https://doi.org/10.1021/jo070236m
Abstract
Narrow-rim 1,3-bis(phenylethynyl)-p-tert-butylcalix[4]arenes were found to be photolabile, producing unprecedented seven-membered oxacyclic systems formed via 7-exo-dig cyclizations and a new [3.2.1]bicyclic system via subsequent 1,8-H shifts. The calixarene provided a scaffold for these unprecedented photochemical reactions to occur.Keywords
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