Abstract: 4-Heteroarylidene-2-phenyl-1, 3-oxazol-5 (4 H)-ones were prepared by reactions of hippuric acid with substituted furan-2-carboxaldehydes or furo [b] pyrrole type aldehydes. The reactivity of various furan-2-carboxaldehyde derivatives in this reaction is discussed. The effect of microwave irradiation on some condensation reactions was compared with “classical” conditions. The results show that microwave irradiation shortens the reaction ...
