Recently we reported a method useful for determining absolute configuration of aromatic o-amino acids in micromolar quantities. The method is based on the
CD-spectra of N-2,4-dinitrophenyl(dnp) derivatives of aromatic amino acids: A simple method for determining their absolute configuration
โ Scribed by Masao Kawai; Ukon Nagai; Motoko Katsumi
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 152 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
In the course of systematic study of the chlroptlcal propertles of DNP-c(amino acids, we noted that CD-spectra of DNP-aromatlc amino acids show characterlstlc pattern, which 1s somewhat different from those of Na,Nw-dl-DNPamino aclds1)'2). They have lower intensity and their shorter wavelength band (ca.335 nm) lies shorter than that(ca.360 nm) of the di-DNP-amino acids.
The CD-spectra of common DNP-aromatic amino acids are reproduced in Fig. 3' C"2
๐ SIMILAR VOLUMES
Aromatic B-amino acids were converted to the Dnp derivatives, and aliphatic ones to Dnp-pMA derivatives. The sign of the Cotton effect near 400 nm reflected the configuration at the B-position without exception. Thus, the relation seems to afford a new reliable method for determining the absolute