Base Promoted 5-endo-dig Cyclizations of Non-Conia-ene Propargyl Ethers: A Mechanistic Investigation
Date of Award
2024
Document Type
Thesis
Publication Status
Version of Record
Submission Date
October 2026
Thesis/Dissertation Advisor [Chair]
Lepore, Salvatore D.
Abstract
Herein, we discuss a novel method for the synthesis of decorated 2,5-dihydrofurans. The base promoted 5-endo-dig cyclization of non-Conia-ene propargyl ethers produces 2,2 disubstituted dihydrofurans. Central to the reaction is the presence of an acidic C–H bond which is activated by an adjacent aromatic heterocycle. The transformation is viable with a wide range of substituents, including N, O, and S containing heterocycles, substituted phenyl rings, and alkyl groups. The cyclization proceeds within 30 seconds at room temperature under the action of potassium tert-butoxide. This work stands apart from the current literature due to the absence of transition metal catalysts and/or harsh reaction conditions. A thorough mechanistic investigation is undertaken to better understand the nature of this unprecedented reaction.
Extent
110 p.
Recommended Citation
Hintze, Silas Q., "Base Promoted 5-endo-dig Cyclizations of Non-Conia-ene Propargyl Ethers: A Mechanistic Investigation" (2024). Electronic Theses and Dissertations 2020 - Present. 1371.
https://digitalcommons.fau.edu/etd_general/1371
Identifier
FA00014376
Comments
Includes bibliography.|Thesis (MS)--Florida Atlantic University, 2024.|FAU Electronic Theses and Dissertations Collection|Includes bibliography.