Some N-methyl-N-(4-chloro-1-phthalazinyl)hydrazones

N-Methyl-N-(4-chloro-1-phthalazinyl)-(E)-hydrazones of the corresponding carbonyl compounds were obtained by condensation of 1-methyl-1-(4-chloro-1-phthalazinyl)hydrazine with carbonyl compounds. The PMR spectra of the products in a number of solvents at various temperatures and the UV spectra in solution and in the solid form were recorded. It was established that a change in the nature of the substituents in the ylidene fragment leads to a change in the three-dimensional structure and the reaction center (C_pht-Cl, C_pht-N, C=N) in acid hydrolysis reactions.Communication LVII from the series Hydrazones. See [1] for communication LVI.Translated from Khimiya Geterotsiklicheskikh Soedenii, No. 4, pp. 530–536, April, 1978.