That may depend on what your R group is. Here is a reference for both R groups being simply phenyl rings:
Preparation of heterocycles by the reaction of diaza binucleophiles with chalcones: influence of the substituent on position 2; Simon, Dominique et al, Journal of Heterocyclic Chemistry, 22(6), 1551-7; 1985.
The reaction doesn't seem to work nearly as well if the R groups are alkyl groups - lower yields in general and more forcing conditions.