Compared with the classical Biginelli reaction conditions,this new method has the advantage of excellent yield(70%～97%) and shorter reaction time(3～5 h).

The title compound 5-acetyl-6-methyl-4-(2-furyl)-3,4-dihydropyrimidine-2(H)-one was synthesized by samarium diiodide catalyzed Biginelli reaction,a one-pot condensation of 2-furaldehyde,urea and 2,4-pentanedione.

The structure of the Biginelli reaction product from β-diketones, salicylaldehyde and urea has been proposed to possess an oxygen-bridge.

A monomer of polyimide 2,2′-bis[4-(3-aminophenoxy)phenyl]propane was prepared from m-dinitrobenzene and bisphenol A through condensation reaction and hydrazine hydrate reduction with an overall yield of 85.

This paper researched the condensation reaction of 2-metylbenzimidazole and 2-methylbenzothio-zole with aromatic aldehyde in acetic anhydride to form 2-(benzimidazol-2-yl)-1-aryl-ethylene derivatives or 2-(benzothiozol-2-yl)-1-aryl-ethylene derivatives.

The experiments show that the condensation reaction doesn't take place without ultrasonic irradiation, otherwise with ultrasonic irriation the reaction not phly occurs in ordinary condition but also good result was obtained.

The application of 1,3-dicyclohexylcarbodiimide(DCC) used as condensation agent in organic synthesis;

Condensation of Benzaldehyde and Methanol Catalyzed by Niobic Acid;

Effect of solvent on diazinon condensation;