DBU-Catalyzed Rearrangement of Secondary Propargylic Alcohols: An Efficient and Cost-Effective Route to Chalcone Derivatives
Rimpa De, Antony Savarimuthu, Tamal Ballav, Pijush Singh, Jayanta Nanda, Avantika Hasija, Deepak Chopra, Mrinal K. Bera*
*Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur, P.O - Botanic Garden, Howrah - 711 103 (WB), India, Email: mrinalkbera26gmail.com
R. De, A. Savarimuthu, T. Ballav, P. Singh, J. Nanda, A. Hasija, D. Chopra, M. K. Bera, Synlett, 2020, 31, 1587-1592.
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DBU catalyzes a rearrangement of diarylated secondary propargylic alcohols to give α,β-unsaturated carbonyl compounds in excellent yields. The typical 1,3-transposition of oxy functionality, characteristic of Meyer-Schuster rearrangements, is not observed. This method offers a broad substrate scope, functional-group tolerance, operational simplicity, and complete atom economy.
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