作者:Jianjun Cheng、Joseph W. Ziller、Timothy J. Deming
DOI:10.1021/ol000122w
日期:2000.6.1
general synthesis of optically active beta-amino acid N-carboxyanhydrides (beta-NCAs) through cyclization of N(beta)-Boc or N(beta)-Cbz beta-amino acids using phosphorus tribromide. The formation of beta-NCAs was confirmed by spectroscopy as well as an X-ray structural determination of beta-homoalanine-N-carboxyanhydride. The beta-NCA molecules could be polymerized in good yield to give optically active
已经开发了通过使用三溴化磷将Nβ-Boc或Nβ-Cbzβ-氨基酸环化来一般合成旋光性β-氨基酸N-羧基酸酐(β-NCA)的方法。β-NCA的形成已通过光谱法以及β-高丙氨酸-N-羧基酸酐的X射线结构测定得到了证实。β-NCA分子可以以高收率聚合,以产生在溶液中采用稳定手性构象的旋光性聚(β-肽)。例如,通过L-β-高苯丙氨酸-N-羧基酸酐的聚合来合成螺旋低聚物(L-β-高苯丙氨酸)。