THE SYNTHESIS OF ALANYL-α-AMINOPROPIONITRILES-(DL-DL, L-DL, and L-L) BY DEHYDRATING THE CORRESPONDING<i>N</i>-<i>o</i>-NITROPHENYLSULFENYLALANYLALANINE AMIDES
作者:Katsuhiro Kawashiro、Hideyuki Yoshida、Shiro Morimoto
DOI:10.1246/cl.1975.323
日期:1975.4.5
N-o-Nitrophenylsulfenylalanylalanine amides(Dl-dl, L-DL, and L-L) were dehydrated In POCl3-pyridine without affecting their N-protecting groups. The N-protected dipeptide nitriles obtained were treated with anhydrous HCl in ethyl acetate to give the hydrochlorides of the corresponding dipeptide nitriles. The results of ion exchange chromatography of these products Indicated that the optical purity of the α-aminopropionitrile group was well retained.
N-o-Nitrophenylsulfenylalanylalanine amides(Dl-dl、L-DL 和 L-L)在 POCl3-吡啶中脱水,但不影响其 N 保护基团。得到的 N 保护二肽腈在乙酸乙酯中用无水 HCl 处理,得到相应二肽腈的盐酸盐。这些产物的离子交换色谱结果表明,α-氨基丙腈基团的光学纯度保持得很好。