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Synthesis of New Chiral Diaza 18-Crown-6 Ethers from Chiral Amines.

✍ Scribed by N. Demirel; Y. Turgut; H. Hosgoeren

Publisher
John Wiley and Sons
Year
2004
Weight
71 KB
Volume
35
Category
Article
ISSN
0931-7597

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## Abstract Enantiomeric discrimination is observed in the ^1^H and ^13^C NMR spectra of secondary and tertiary amines in the presence of (βˆ’)‐(18‐crown‐6)‐2,3,11,12‐tetracarboxylic acid (**1**). Nonequivalence of the resonances of prochiral nuclei in primary and secondary amines is also observed wh