Application of a multi-SO3H Brønsted acidic ionic liquid in water: A highly 
efficient and reusable catalyst for the regioselective and scaled-up synthesis 
of pyrazoles under mild conditions.

Safaei, S.; Mohammadpoor-Baltork, I.; Khosropour, A. R.; Moghadam, M.; Tangestaninejad, S.; Mirkhani, V.; Kia, R.

doi:10.1039/C2RA20624B

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Application of a multi-SO3H Brønsted acidic ionic liquid in water: A highly efficient and reusable catalyst for the regioselective and scaled-up synthesis of pyrazoles under mild conditions.

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Kia, R.
Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Safaei, S., Mohammadpoor-Baltork, I., Khosropour, A. R., Moghadam, M., Tangestaninejad, S., Mirkhani, V., et al. (2012). Application of a multi-SO3H Brønsted acidic ionic liquid in water: A highly efficient and reusable catalyst for the regioselective and scaled-up synthesis of pyrazoles under mild conditions. Royal Society of Chemistry Advances, 2, 5610-5616. doi:10.1039/C2RA20624B.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-0BFF-B

Abstract

An elegant and efficient procedure with exceptionally mild conditions for the regioselective synthesis of pyrazoles by the reaction of various 1,3-diketones and hydrazines/hydrazides using a multi-SO3H Brønsted acidic room temperature ionic liquid as a powerful catalyst in aqueous media has been developed. The ionic liquid was easily separated from the reaction mixture and was recycled and used for at least six consecutive runs without any loss of activity.