The Isolation of Isomeric 5-Oxazolones and the Assignment of Their Structures by Means of NMR Spectroscopy
作者:Yoshio Iwakura、Fujio Toda、Yoshinori Torii
DOI:10.1246/bcsj.40.149
日期:1967.1
N-meth-acryloyl-α-amino acids, new isomerized oxazolones were obtained. By NMR spectroscopy, the structures of isomerized oxazolones were determined to be pseudoxazolones (2-isopropylidene-4-alkyl-3-oxazolin-5-ones). The NMR spectra of several pseudoxazolones were measured and compared with the normal oxazolones.
The Preparation of α-Amino-α-benzylmercaptopropionic Acid Derivatives
作者:Akira Kaneda、Rokuro Sudo
DOI:10.1246/bcsj.43.2159
日期:1970.7
The preparation of N-acyl derivatives of α-amino-α-benzylmercaptopropionic acid was investigated. It is described that pyruvic acid was treated with amides to afford N-acyl-α-amino-α-hydroxypropionic acids, which were then substituted into N-acyl-α-amino-α-benzylmercaptopropionic acids. In another experiment, Steglich’s method was improved in order to afford three N-acyl derivatives of α-amino-α-b