Preparation of silica-bonded N-propyltriethylenetetramine as a recyclable solid base catalyst for the synthesis of 4,4 '-(arylmethylene)bis(1H-pyrazol-5-ols)

作者：Niknam Khodabakhsh^*; Habibabad Maryam Sadeghi; Deris Abdollah; Aeinjamshid Nasrin

来源：Monatshefte fur Chemie, 2013, 144(7): 987-992.

DOI：10.1007/s00706-012-0910-6

• Heterogeneous catalyst
• Solid base
• Silica-bonded N-propyltriethylenetetramine
• Catalyst
• Aldehydes
• Heterocycles

Silica-bonded N-propyltriethylenetetramine was prepared via the reaction between 3-silicapropyl chloride and triethylenetetramine. This heterogeneous solid base was used as a catalyst for the synthesis of 4,4'-(arylmethylene)bis(1H-pyrazol-5-ols) by a one-pot condensation of aromatic aldehydes with 3-methyl-1-phenyl-5-pyrazolone in 72-93 % yields. The catalyst could be recycled several times without any additional treatment.

• 出版日期2013-7