Ru(ii)-Catalyzed C–H activation/annulation reactions of N-aryl-pyrazolidinones with sulfoxonium ylides: synthesis of cinnoline-fused pyrazolidinones

Literature Information

Publication Date 2021-09-13
DOI 10.1039/D1QO01001H
Impact Factor 5.281
Authors

Hai-Shan Jin, Ya-Zhen Du, Qing-Yang Zhao, Li-Ming Zhao


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Abstract

The first Ru(II)-catalyzed cascade C–H activation/annulation reactions of N-aryl-pyrazolidinones with sulfoxonium ylides for the synthesis of cinnoline-fused pyrazolidinones are reported. This transformation proceeds smoothly under operationally simple conditions in 10 min using a simple and cheap catalytic system consisting of Ru(II) and Zn(OTf)2. A wide range of substrates were assessed in this transformation, and the products were isolated in good to excellent yields (51% to 99%).

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Organic Chemistry Frontiers

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Organic Chemistry Frontiers publishes high-quality research from across organic chemistry. Emphases are placed on studies that make significant contributions to the field of organic chemistry by reporting either new or significantly improved protocols or methodologies. Topics include, but are not limited to the following: Organic synthesis Development of synthetic methodologies Catalysis Natural products Functional organic materials Supramolecular and macromolecular chemistry Physical and computational organic chemistry

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