SYNTHESIS, STRUCTURE, AND PHYSICOCHEMICAL PROPERTIES OF 3-METHYL AND 3,3-DIMETHYL DERIVATIVES OF 1-(4',4'-DIMETHYL-2',6'-DIOXOCYCLOHEX-1'-YL)-3,4-DIHYDROISOQUINOLINE

3,3-Dimethyl- and 3-methyl-1-(4',4'-dimethyl-2',6'-dioxocyclohex-1'-yl)-3,4-dihydroisoquinolines have been synthesized. Crystal and molecular structures of the 3,3-dimethyl derivative have been determined. In the crystalline state this compound exists as a tautomeric form where a hydrogen atom is located at the N atom of the dihydroisoquinoline fragment of the molecule. The tautomeric equilibrium does not shift noticeably in solutions, as shown by IR, UV, and NMR spectroscopy

SYNTHESIS, STRUCTURE, AND PHYSICOCHEMICAL PROPERTIES OF 3-METHYL AND 3,3-DIMETHYL DERIVATIVES OF 1-(4',4'-DIMETHYL-2',6'-DIOXOCYCLOHEX-1'-YL)-3,4-DIHYDROISOQUINOLINE

3,3-Dimethyl- and 3-methyl-1-(4',4'-dimethyl-2',6'-dioxocyclohex-1'-yl)-3,4-dihydroisoquinolines have been synthesized. Crystal and molecular structures of the 3,3-dimethyl derivative have been determined. In the crystalline state this compound exists as a tautomeric form where a hydrogen atom is located at the N atom of the dihydroisoquinoline fragment of the molecule. The tautomeric equilibrium does not shift noticeably in solutions, as shown by IR, UV, and NMR spectroscopy