Im. Abbass et al., 1,3-DIPOLAR CYCLOADDITION OF BENZONITRILIUM N-PHENYLIMIDE WITH 4-ARYLMETHYLIDENE-3-PHENYLISOXAZOL-5(4H)-ONES, Journal of chemical research. Synopses, (5), 1995, pp. 190-191
The title reaction, when carried out in benzene and in the presence of
triethylamine, afforded 5-aryl-1,3-diphenylpyrazole-4-carboxylic acid
s 11 in 50-60% yields.