Synthesis, crystal structure, and spectra of 3,3-dimethyl-1-N-(1'-phenyl-2',3'-dimethyl-5'-oxo-3'-pyrazolin-4'-yl)imino-1,2, 3,4-tetrahydroisoquinoline

The synthesis and the crystal and molecular structure of 3,3-dimethyl-1-N-(1'-phenyl-2',3'-dimethyl-5'-oxo-3'-pyrazolin-4'-yl)imino-1,2, 3,4-tetrahydroisoquinoline are reported. As is evidenced by the 1H NMR, IR, and electron spectra, the tautomeric form of the compounds observed in the crystal is also retained in solutions.