Citation: Khodabakhsh Niknam, Nasrolah Jafarpour, Ebrahim Niknam. Silica-bonded N-propylsulfamic acid as a recyclable catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones[J]. Chinese Chemical Letters, ;2011, 22(1): 69-72. doi: 10.1016/j.cclet.2010.09.013
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2, 3-Dihydroquinazolin-4(1H)-one derivatives are synthesized via a one-pot, three component reaction of isatoic anhydride and an aromatic aldehyde with ammonium acetate or primary amine catalyzed by silica-bonded N-propylsulfamic acid (SBNPSA) in refluxing ethanol.
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