Ruthenium-Catalyzed Divergent Acceptorless Dehydrogenative Coupling of 1,3-Diols with Arylhydrazines: Synthesis of Pyrazoles and 2-Pyrazolines.

Org Lett

Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People's Republic of China.

Published: June 2022

Herein, the divergent transformations of 1,3-diols with arylhydrazines via acceptorless dehydrogenative coupling reactions to selectively synthesize pyrazoles and 2-pyrazolines were reported, which were based on Ru(CO)/NHC-phosphine-phosphine catalytic systems. The reactions featured low catalyst loading, high selectivity, wide substrate scope, and good yields, with only water and hydrogen gas (H) as the byproducts.

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http://dx.doi.org/10.1021/acs.orglett.2c01497DOI Listing

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