Conclusions
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1.
The synthesis has been accomplished of the methylamides ofα-N-benzoyl-β-(N′-methyl-N″-phenyl-thiocarbamyl)propionic ] and butyric acids, which under the conditions used for dehydration of polypeptide chains by the Edman method through treatment with trifluoroacetic acid were converted into cyclic derivatives of hexahydropyrimidine.
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2.
Derivatives of D, L-erythro- and D, L-threo-diaminobutyric acid were readily and reversibly converted into one another under the action of acidic and basic reagents.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khmicheskaya, No. 7, pp. 1603–1608, July, 1976. ]
The authors express their thanks to L. B. Senyavina for recording and discussing the IR spectra and to S. A. Koz'min and T. A. Balasheva Likewise for the PMR spectra.
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Mirzayanova, M.N., Medvedeva, I.V., Fedulova, I.E. et al. Synthesis and properties of derivatives of diaminopropionic and diaminobutyric acids. Russ Chem Bull 25, 1520–1524 (1976). https://doi.org/10.1007/BF00920830
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DOI: https://doi.org/10.1007/BF00920830