Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (4): 517-525.DOI: 10.1016/S1872-2067(15)61060-9

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An environmentally-friendly base organocatalyzed one-pot strategy for the regioselective synthesis of novel 3,6-diaryl-4-methylpyridazines

Mehdi Rimaz, Farkhondeh Aali   

  1. Department of Chemistry, Payame Noor University, PO Box 19395-3697, Tehran, Iran
  • Received:2016-01-07 Revised:2016-01-29 Online:2016-03-30 Published:2016-03-30
  • Contact: Mehdi Rimaz

Abstract:

This report describes a new three-component strategy for the regioselective synthesis of a series of tri-substituted pyridazines via a 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalyzed condensation of propiophenones, arylglyoxalmonohydrates and hydrazine hydrate in water. This method provides a green and convenient one-pot route toward a diverse set of 3,6-diaryl-4-methylpyridazines bearing various aryl substituents. This procedure is highly regioselective, operationally simple, uses water as a safe, environmentally friendly solvent, and DABCO as a green base-organocatalyst, and affords good to excellent yields of products.

Key words: 1,4-Diazabicyclo[2.2.2]octane (DABCO), Propiophenone, Arylglyoxalmonohydrate, Pyridazine