Volume 58, Issue 33 pp. 11424-11428
Communication

Utilizing Carbonyl Coordination of Native Amides for Palladium-Catalyzed C(sp3)−H Olefination

Hojoon Park

Hojoon Park

Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037 USA

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Dr. Yang Li

Dr. Yang Li

Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037 USA

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Prof. Dr. Jin-Quan Yu

Corresponding Author

Prof. Dr. Jin-Quan Yu

Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037 USA

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First published: 11 June 2019
Citations: 65

A previous version of this manuscript has been deposited on a preprint server (https://doi.org/10.26434/chemrxiv.8135534.v1).

Graphical Abstract

Go native: PdII-catalyzed C(sp3)−H olefination of native amide substrates was developed. To utilize the extremely weak carbonyl coordination ability of amides, an electron-deficient pyridinesulfonic acid ligand was designed. Structurally diverse amide substrates, including lactams, underwent olefination without the undesired cyclization. Olefination products were further diversified through synthetic transformations on the alkenyl moiety.

Abstract

PdII-catalyzed C(sp3)−H olefination of weakly coordinating native amides is reported. Three major drawbacks of previous C(sp3)−H olefination protocols, 1) in situ cyclization of products, 2) incompatibility with α-H-containing substrates, and 3) installation of exogenous directing groups, are addressed by harnessing the carbonyl coordination ability of amides to direct C(sp3)−H activation. The method enables direct C(sp3)−H functionalization of a wide range of native amide substrates, including secondary, tertiary, and cyclic amides, for the first time. The utility of this process is demonstrated by diverse transformations of the olefination products.

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