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
The relation between cd spectra of n-dithioethoxycarbonyl derivatives of β-amino acids and their configurations
✍ Scribed by Takashi Yamada; Shigeru Kuwata; Hiroshi Watanabe
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 249 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
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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
## Abstract Rules relating the stereochemistry of N‐Dnp (Dnp: 2,4‐dinitrophenyl) derivatives of α‐amino acids and peptides and the sign of the Cotton effects at the longest wavelength band (ca. 400 nm) are surveyed. Some new data and insights concerning the CD spectra of Dnp–α‐amino acids are inclu
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