Di- and Tri-1-(1-naphthyl)ethylamino-Substituted 1,3,5-Triazine Derivatives: A New Class of Versatile Chiral Auxiliaries for NMR Spectroscopy
摘要:
2-Chloro-4,6-bis[(R)-1-(1-naphthyl)ethylamino]-1,3,5-triazine, 2,4,6-tris[(R)-1-(1-naphthyl)ethylamino]1,3,5-triazine, and 2,4-bis[(R)-1-(1-naphthyl)ethylamino]-6-[(S)-1-(1-naphthyl)ethylamino]-1,3,5-triazine have been synthesized, and their efficiency and versatility as chiral solvating agents for the determination by NMR of the enantiomeric composition of derivatized or underivatized chiral compounds have been demonstrated.
Di- and Tri-1-(1-naphthyl)ethylamino-Substituted 1,3,5-Triazine Derivatives: A New Class of Versatile Chiral Auxiliaries for NMR Spectroscopy
摘要:
2-Chloro-4,6-bis[(R)-1-(1-naphthyl)ethylamino]-1,3,5-triazine, 2,4,6-tris[(R)-1-(1-naphthyl)ethylamino]1,3,5-triazine, and 2,4-bis[(R)-1-(1-naphthyl)ethylamino]-6-[(S)-1-(1-naphthyl)ethylamino]-1,3,5-triazine have been synthesized, and their efficiency and versatility as chiral solvating agents for the determination by NMR of the enantiomeric composition of derivatized or underivatized chiral compounds have been demonstrated.
CD data of the optically pure 2-[(R)-1-(9-anthryl)ethylamino]-4-chloro-6-[(R)-1-(l-naphthyl)-ethylamino] 2-[(R)-1-(9-anthryl)ethylamino]-4,6-bis[(1-naphthyl)-ethylamino]-1,3,5-triazine, 2,4-bis[(R)-1-(9-anthryl)ethylamino]-6-chloro-1,3,5-triazine are presented. The analysis of the CD spectra by means of the nonempirical DeVoe approach has afforded the complete conformational characterisation of the three s-triazine derivatives, allowing us to establish how the conformation of these derivatives depends on the nature of the substituent 1-arylethylamino groups.