作者:Arndt M. Brückner、Margarita Garcia、Andrew Marsh、Samuel H. Gellman、Ulf Diederichsen
DOI:10.1002/ejoc.200300269
日期:2003.9
Four novel β-amino acids bearing the canonical nucleobases guanine, cytosine, adenine, and thymine in the side chain, are synthesized starting from Boc-L-aspartic acid 4-benzyl ester. The syntheses are accomplished in six steps by the nucleophilic substitution of (S)-β-(tert-butoxycarbonylamino)-δ-bromopentanoic acid benzyl ester with the corresponding nucleobase derivative as the key step. The guaninyl
以 Boc-L-天冬氨酸 4-苄基酯为起始原料,合成了四种新的 β-氨基酸,在侧链中含有标准核碱基鸟嘌呤、胞嘧啶、腺嘌呤和胸腺嘧啶。该合成分六个步骤完成,主要步骤是 (S)-β-(叔丁氧基羰基氨基)-δ-溴戊酸苄酯与相应的核碱基衍生物的亲核取代。鸟嘌呤和胞嘧啶 β-氨基酸被构建到 β-肽中,通过温度依赖性 CD 和 UV 光谱进行研究。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)