作者:Tateaki Wakamiya、Kuniaki Shimbo、Tetsuo Shiba、Kiichiro Nakajima、Masahiro Neya、Kenji Okawa
DOI:10.1246/bcsj.55.3878
日期:1982.12
threo-3-Methyl-d-cysteine as a moiety of β-methyllanthionine in the peptide antibiotic nisin was synthesized stereospecifically. The reaction of (2R,3R)-3-methyl-2-aziridinecarboxylic acid derivative prepared from d-threonine with thiobenzoic acid gave the β-mercapto α-amino acid derivative of the same configuration as the starting material. A stereochemistry of the product was retained as a result of double inversion mechanism through the reactions. Thus, we could prepare threo-3-methyl-d-cysteine, i.e., (2S,3S)-2-amino-3-mercaptobutanoic acid which is required for the synthetic study of nisin.
立体定向合成了作为多肽抗生素尼生素中 β-甲基蛋氨酸的分子的苏氨酸-3-甲基-d-半胱氨酸。由 d-苏氨酸制备的 (2R,3R)-3-甲基-2-氮丙啶羧酸衍生物与硫代苯甲酸反应,得到了与起始原料构型相同的 β-巯基 α-氨基酸衍生物。由于反应中的双反转机制,产物的立体化学结构得以保留。因此,我们可以制备出尼生素合成研究中所需的苏-3-甲基-d-半胱氨酸,即 (2S,3S)-2-氨基-3-巯基丁酸。