简易合成天然修饰核苷2'-脱氧古鸟苷

该文用改良的Pinner反应(通过加乙酰氯到甲醇中产生HCl,取代直接通HCl气体),将7-氰基-7-脱氮-2'-脱氧鸟苷(dPreQ₀)转化为7-甲脒基-7-脱氮-2'-脱氧鸟苷(2'-脱氧古鸟苷,dG⁺),产率为92.59%,其化学结构经核磁共振、高分辨质谱分析确证.优化了关键中间体dPreQ₀的合成纯化工艺.采用改良的Pinner反应,以2-氨基-4-氯吡咯并2,3-d]嘧啶为起始物,通过7步反应制备dG⁺的总反应产率达到33%.dG⁺及其中间体的合成方法对其规模化合成具有重要意义,也为生物技术的发展提供支持.

The Facile Synthesis of Natural Modified Nucleoside 2'-Deoxyarchaeosine

The chemical synthesis of naturally occurring 2'-deoxyarchaeosine(dG⁺)is achieved from dPreQ₀ by improved Pinner reaction(adding acetyl chloride to methanol in an ice bath,instead of blowing hydrogen chloride gas),with yield of 92.59%.The structure of dG⁺ is confirmed by NMR and HR-MS.The protocol of key intermedium-7-cyano-2'-deoxy-7-deazaguanosine(dPreQ₀)is optimized.The total yield of dG⁺ is 33% through 7 steps,using 2-amino-4-chloro-pyrrolo2,3-d]pyrimidine as starting material.The synthetic process of dG⁺ and its intermediums is of great importance for their scale-up synthesis,which will provide beneficial significance for the development of biotechnology.