Volume 133, Issue 41 pp. 22398-22403
Zuschrift

Enantioselective Lactonization by π-Acid-Catalyzed Allylic Substitution: A Complement to π-Allylmetal Chemistry

Arun Raj Kizhakkayil Mangadan

Arun Raj Kizhakkayil Mangadan

Florida Center for Heterocyclic Compounds and, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611 USA

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Ji Liu

Ji Liu

Florida Center for Heterocyclic Compounds and, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611 USA

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Prof. Dr. Aaron Aponick

Corresponding Author

Prof. Dr. Aaron Aponick

Florida Center for Heterocyclic Compounds and, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611 USA

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First published: 22 August 2021
Citations: 1

Abstract

Asymmetric allylic alkylation (AAA) is a powerful method for the formation of highly useful, non-racemic allylic compounds. Here we present a complementary enantioselective process that generates allylic lactones via π-acid catalysis. More specifically, a catalytic enantioselective dehydrative lactonization of allylic alcohols using a novel PdII-catalyst containing the imidazole-based P,N-ligand (S)-StackPhos is reported. The high-yielding reactions are operationally simple to perform with enantioselectivities up to 99 % ee. This strategy facilitates the replacement of a poor leaving group with what would ostensibly be a better leaving group in the product avoiding complications arising from racemization by equilibration.

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