Synthesis of 2(1H)-Pyrimidinone-Containing .ALPHA.-Amino Acid Derivatives by Chemical Modification of L-Glutamic Acid.
作者:Akira KATOH、Mika INOKAWA、Junko OHKANDA、Keiryo MITSUHASHI
DOI:10.1248/cpb.42.1514
日期:——
A commercially available L-glutamic acid γ-methyl ester was converted into the corresponding urea-containing α-amino acid via the hydrazide, the azide, and then the isocyanate. The condensation of the urea-containing α-amino acid with β-diketones under acidic conditions afforded 2(1H)-pyrimidinone-containing α-amino acid derivatives in reasonable yields. The 1H-NMR analysis of the dipeptide indicated that no detectable racemization had occurred during the chemical modification of L-glutamic acid.
市售的 L-谷氨酸γ-甲酯通过酰肼、叠氮化物和异氰酸酯转化成相应的含脲α-氨基酸。在酸性条件下,含脲的α-氨基酸与β-二酮缩合,得到了2(1H)-含嘧啶酮的α-氨基酸衍生物,产率合理。二肽的 1H-NMR 分析表明,在对 L-谷氨酸进行化学修饰的过程中没有发现消旋化现象。