New derivatives obtained from ortho-isobornylphenols and 4,13-diaza-18-crown-6
摘要:
New aminomethyl derivatives were synthesized via Mannich reaction of 4,13-diaza-18-crown-6 with racemic 2-isobornyl-4-methylphenol and 2-isobornylphenol. The diastereoisomers (meso-form and racemate) derived from the racemic terpenophenols were detected by the C-13 NMR spectroscopy. The signals were assigned by comparison with the C-13 NMR spectrum of the enantiomer of one of the derivatives. The optically active disubstituted diaza-crown-ether molecule was studied by the XRD analysis that showed the presence of the intramolecular hydrogen bonds.