Cz. Zhang et al., SYNTHESIS OF TETRASUBSTITUTED IMIDAZOLES VIA ALPHA-(N-ACYL-N-ALKYLAMINO)-BETA-KETOAMIDES ON WANG RESIN, Tetrahedron letters, 37(6), 1996, pp. 751-754
The first example of a four component condensation of arylglyoxals, 1
degrees amines, carboxylic acids and isocyanides on Wang resin is desc
ribed. These products can be cyclized in the presence of NH4OAc-AcOH t
o yield tetrasubstituted imidazoles.