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Abstract
AbstractSarcosine and pipecolic acid give with phenyl isothiocyanate in an alkaline medium according to the Edman method “abnormal” adducts, the structures of which are elucidated amongst others with the aid of spectroscopic data. In ethanol the 3‐phenyl‐2‐thiohydantoins are formed from the same reactants.With methyl isothiocyanate on the other hand sarcosine and pipecolic acid always give the 3‐methyl‐2‐thiohydantoins, both in an alkaline medium and in ethanol.In the literature contradictions are to be found about the structure of the reaction product of the ethyl ester of pipecolic acid with phenyl isothiocyanate. From our investigation it appears that invariably the phenylthiohydantoin is formed.The proton magnetic resonance spectra of 3‐phenyl‐2‐thiohydantoins of some amino and imino acids are discussed.
Published Version
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