N-Carboxy α-dehydroamino acid anhydride, derived from N-benzyloxycarbonyl α-dehydroamino acid (DHA) and thionyl chloride, was found to be very useful for the synthesis of N-free DHA ester by alcoholysis and N-acetyl dehydrodipeptide ester by coupling was α-amino acid ester.
N-羧基 α-脱氨基酸酸酐是由 N-苄氧羰基 α-脱氨基酸(DHA)和氯化亚硫酰制得的,发现它在通过醇解合成无氮 DHA 酯和通过偶联合成 N-乙酰脱二肽酯时非常有用。
Dehydrooligopeptides. V. Synthesis of N-carboxy .ALPHA.-dehydroamino acid anhydrides and their transformation to .ALPHA.-dehydroamino acid and dehydrooligopeptide derivatives.
The synthesis of N-carboxy α-dehydroamino acid anhydrides (ΔNCA) from benzyloxycarbonyl-α-dehydroamino acids and the subsequent conversion of these products into new α-dehydroamino acid and dehydrooligopeptide derivatives are described. It was found that the new ΔNCA derivatives were very useful synthons for dehydropeptides. The racemization behavior and configurational determination of all the new dehydrooligopeptides thus obtained are discussed.