期刊
TETRAHEDRON-ASYMMETRY
卷 26, 期 23, 页码 1328-1334出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetasy.2015.10.011
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资金
- Czech Science Foundation [P207/12/0447]
- Ministry of Education, Youth and Sports of the Czech Republic [20/2015]
Five optically active urea derivatives 1-5 were synthesized via reaction of (R)-1,1'-binaphthalene-2,2'-diamine with the corresponding isocyanates. Analysis by H-1 nuclear magnetic resonance spectroscopy demonstrated that 1 was the best chiral solvating agent for the determination of the enantiomeric excesses of various sulfoxides (13 examples). This compound was more efficient in terms of discriminating between enantiomers than the commercially available chiral solvating agent ((R)-(3,5-dinitro-benzoyl)-alpha-phenethylamine). Large non-equivalent chemical shifts (0.1 ppm) can be achieved, especially with aliphatic sulfoxides. (C) 2015 Elsevier Ltd. All rights reserved.
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