the corresponding bis-acid, and the latter was cyclized with diamino acids to afford macrocyclic tripeptide derivatives. The reaction of the bis ester with hydrazine hydrate gave bis-hydrazide, which was condensed with aldehydes to obtain the corresponding Schiff base derivatives. The structures of the newly synthesized compounds were confirmed by IR, 1H and 13C NMR, and MS spectral data and elemental
以
吡啶-
3,5-二羧酸和
L-苯丙氨酸甲酯为起始原料,合成了一系列大环三肽和线性二肽席夫碱衍
生物。用
L-苯丙氨酸甲酯处理-3,5-二羰基
吡啶二
氯,得到N,N '-(
吡啶-3,5-二酰基二羰基)双(
L-苯丙氨酸甲酯),将其用1N
氢氧化钠水解成相应的二酸,后者用二
氨基酸环化,得到大环三肽衍
生物。双酯与
水合
肼的反应得到双酰
肼,将其与醛缩合以获得相应的席夫碱衍
生物。新合成的化合物的结构通过IR,1 H和13 C NMR,MS光谱数据和元素分析。一些新合成的化合物的抗微
生物活性与用作对照的
链霉素相当。