催化学报 ›› 2012, Vol. 33 ›› Issue (8): 1312-1317.DOI: 10.1016/S1872-2067(11)60421-X
Khodabakhsh NIKNAM*, Abbas JAMALI, Marzieh TAJADDOD, Abdollah DERIS
Khodabakhsh NIKNAM*, Abbas JAMALI, Marzieh TAJADDOD, Abdollah DERIS
摘要: A simple and efficient procedure for the preparation of silica-bound N-propyl triethylenetetramine sulfamic acid (SBPTETSA) by the reaction of silica-bound N-propyl triethylenetetramine (SBPTET) with chlorosulfonic acid in chloroform is described. Silica-bound N-propyl triethylenetetramine sulfamic acid was employed as a recyclable catalyst for the synthesis of 2-amino-4,6-diarylnicotinonitriles from the multi-component reaction of an acetophenone derivative, an aromatic aldehyde, malononitrile, and ammonium acetate under solvent-free conditions at 100 °C. The heterogeneous catalyst was recycled for five consecutive runs in the optimized multi-component reaction of 4-chloroacetophenone, 4-chloroenzaldehyde, malononitrile, and ammonium acetate without significant loses to its catalytic activity.