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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Synthetic Incorporation of Metal Complexes into Nucleic Acids and Peptides Directed toward Functionalized Molecules
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Synthetic Incorporation of Metal Complexes into Nucleic Acids and Peptides Directed toward Functionalized Molecules

机译:金属配合物到核酸和肽的合成纳入功能分子。

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摘要

Novel synthetic aproaches for incorporation of metal complexes into nucleic acids and peptides are described.First,novel artificial #beta#-C-nucleosides bearing a chelator nucleobase (2-aminophenol,catechol,or o-phenylenediamine) have been synthesized.These artificial nucleobases were introduced for alternative base pariring through metal coor-dination instead of the hydrogen bonding in natural DNA.~1H NMR and mass spectral studies clearly showed that o-phenylenediamine-type nucleoside forms a stable 2:1 square-planar complex with a Pd~II ion,providing an alternative DNA base pariring thorugh metal complexation.Secondly,an efficient strategy for the liquid-phase synthesis of cyclic metallopeptides having a repeating Gly-L-Cys(teryPt~II) sequence,cyclo[-Gly-L-Cys(terpyPt~II)-]_nCl_n(n=3,4),has been developed.These cyclic metallopeptides were obtained by cyclization of the corresponding linear peptides ,H_2[-Gly-L-Cys(terpyPt~II)-]_nOHcentre dot (CF_3CO_2)_(n+1)(n=3,4), in moderate yields.The former cyclic hexapeptide was found to act as a positively charged anion receptor.This synthetic approach would provide a powerful tool for arraying metal centers on cyclopeptide frameworks.
机译:描述了将金属配合物掺入核酸和肽的新型合成方法。首先,合成了带有螯合剂核碱基(2-氨基苯酚,邻苯二酚或邻苯二胺)的新型人工#beta#-C-核苷。这些人工核碱基1 H NMR和质谱研究清楚地表明,邻苯二胺型核苷与Pd〜形成了稳定的2:1方平面络合物,从而通过金属配位取代了碱基配对,取代了天然DNA中的氢键。 II离子,提供了与金属金属络合的另一种DNA碱基。其次,一种液相合成具有重复Gly-L-Cys(teryPt〜II)序列,环[-Gly-L-Cys的环状金属肽的有效策略(terpyPt〜II)-] _ nCl_n(n = 3,4)已经开发出来。这些环状金属肽是通过环化相应的线性肽H_2 [-Gly-L-Cys(terpyPt〜II)-] _ nOH中心点而获得的(CF_3CO_2)_(n + 1)(n = 3,4),中等产量发现前一种环状六肽可作为带正电的阴离子受体,这种合成方法将为在环状肽骨架上排列金属中心提供强大的工具。

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