Cellulose sulfuric acid as a new, biodegradable and environmentally friendly bio-polymer for synthesis of 4,4'-(arylmethylene)bis(3-methyl-1-phenyl-1h-pyrazol-5-ols)

• ELAHEH MOSADDEGH ^[1] ; ASADOLLAH HASSANKHANI ^[1] ; AMIN BAGHIZADEH ^[2]
  1. [1] High Technology & Environmental Sciences International Center for Science Department of Materials Science
  2. [2] High Technology & Environmental Sciences International Center for Science Department of Biotechnology
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 55, Nº. 4, 2010, págs. 419-420
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • The one-pot multicomponent synthesis of 4,4'-arylmethylene-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) was performed effectively by tandem Knoevenagel-Michael reaction of aryl aldehydes and 5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one in the presence of a catalytic amount of cellulose sulfuric acid as an environmentally friendly biopolymer-based solid acid catalyst at reflux conditions. All of obtained compounds were characterized by FT IR, ¹H and 13C NMR. This new methodology is of interest due to minimizing the cost operational hazards and environmental pollution, high yields, short reaction time, cost effective and simple work-up.