NMR SPECTROSCOPIC AND X-RAY STRUCTURAL CHARACTERIZATION OF TWO DIARYL DERIVATIVES OF (4-CYANO-6-METHYL-3,8-DIOXO-2,3,5,6,7,8-HEXAHYDROPYRIDO [3,4-c]PYRIDAZIN-6-YL)HYDRAZONO-ACETIC ACID ETHYL ESTER

摘要

~1H, ~(13)C and ~(15)N NMR chemical shifts have been measured and assigned For [4-cyano-2-(3,4-dimethylphenyl)-6-methyl-3I8-dioxo-2,3]5,617]8-hexahydropyrido[3,4-c]pyridazin-6-yl-(3,4-dimethylphenyl)-hydrazono]- and [4-cyano-2-(3-chloro,4-methylpheiiyl)-6-methyl-3,8-dioxo-2,3,5,6,7,8-hexahydropyrido[3,4-c]-pyridazin-6-yl-(3-chloro,4-methylphenyl)hydiazono]-acetic acid ethyl esters. The structure of the first compound was also verified by a single crystal X-ray analysis.