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Two catalyst precursors—DPB (N,N′-diphenyl-2,3-butadiimine) and PDP (N-phenyl-2,5-dimethyl-pyrrole) were synthesized by reactions of diketones and aniline in alcohol. N,N′-diphenyl-2,3-butadiimine and N-phenyl-2,5-dimethyl-pyrrole were characterized by IR