88989-00-8Relevant academic research and scientific papers
RING-CHAIN TAUTOMERISM AND THERMO- AND PHOTOCHROMISM OF 3-(1-HYDROXY-4-METHYL-2-NAPHTYL)PROPENAL IMINES
Andreeva, I.M.,Babeshko, O.M.,Bondarenko, E.M.,Volbushko, N.V.,Knyazhanskii, M.I.,et al.
, p. 824 - 831 (1983)
Series of previously undescribed 3-(1-hydroxy-4-methyl-2-naphtyl)propenal imines was synthesized.In the crystalline state all of the imines, except the N-(p-nitrophenyl)imine, have an open o-quinoid structure, whereas in solutions in nonpolar solvents they exist in the cyclic 2H-chromene form.In polar solvents the imines display ring-chain tautomeric equilibrium of the 2-chromene and o-quinoid forms, the relative percentages of which a determined by the character of the substituent in the amino component of the molecule and by the polarity of the solvent.The N-(p-nitrophenyl)imine as the 2H-chromene structure in the solid phase and in solvent.
