Studies on the Total Synthesis of (+/-)-Cameroonan-7alpha-Ol and Presilphiperfolan-8-Ol and Discovery of a Novel Stereoselective Prins Cyclization of Delta,epsilon-Unsaturated Ketones
Davis, Chad Eric
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https://hdl.handle.net/2142/84098
Description
Title
Studies on the Total Synthesis of (+/-)-Cameroonan-7alpha-Ol and Presilphiperfolan-8-Ol and Discovery of a Novel Stereoselective Prins Cyclization of Delta,epsilon-Unsaturated Ketones
Author(s)
Davis, Chad Eric
Issue Date
2003
Doctoral Committee Chair(s)
Coates, Robert M.
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Organic
Language
eng
Abstract
A novel stereoselective Prins cyclization reaction of unsaturated ketones was discovered. It was found that reaction of TiCl4 with delta,epsilon- or epsilon,zeta-unsaturated ketones at low temperature followed by buffered methanolysis provided monocyclic and bicyclic cis 3-chlorocyclohexanols. Testing of ten unsaturated ketones and four acid activators provided evidence for substrate generality while the stereoselectivity was rationalized by intramolecular delivery of the nucleophile.
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