Ru(ii)-catalyzed regioselective [4 + 1] redox-neutral spirocyclization of aryl amidines with diazopyrazolones: direct access to spiro[indole-3,4′-pyrazol]-5′-ones

Author:

Cui Bo1,Shen Jian1,Feng Yadong2,Lin Shenghui1,Cui Xiuling1ORCID

Affiliation:

1. Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China

2. Engineering Research Center of Natural Cosmeceuticals College of Fujian Province and Department of Public Health and Medical Technology, Xiamen Medical College, Xiamen, Fujian 361023, P. R. China

Abstract

An efficient protocol to construct spiro[indole-3,4′-pyrazol]-5′-ones via ruthenium(ii)-catalyzed selective C–H bond activation/[4 + 1] spirocyclization starting from easily available N-aryl amidines and diazopyrazolones has been developed.

Funder

Higher Education Discipline Innovation Project

Huaqiao University

Fujian Provincial Department of Science and Technology

Publisher

Royal Society of Chemistry (RSC)

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