The regularities of bifunctional catalysis of the n-butylaminolysis of p-nitrophenylmethylcarbonate are studied in benzene in the presence of acetic acid, n-butanol, phenylbutylbutylphenylurethane, and N,N-diphenyldibutylurea. In all cases, the active form of the catalyst is its monomer. Unlike a noncatalytic process, in which dimeric and trimeric forms of the amine participate, the order of the catalytic reaction decreases by one, which attests to the substitution of the amine molecule for the catalyst molecule in the structure of the ''microreactor'', in which the rearrangement of atoms and bonds occurs to form the final product.