申请人:Kim Kee Sung
公开号:US20050026930A1
公开(公告)日:2005-02-03
This application relates to monomers of the general formula (I) for the preparation of PNA (peptide nucleic acid) oligomers and provides method for the synthesis of both predefined sequence PNA oligomers and random sequence PNA oligomers:
wherein E is sulfur or oxygen; J is nitrogen or C—R′;
R1, R′ is independently H, halogen, alkyl, nitro, nitrile, alkoxy, halogenated alkyl, halogenated alkoxy or a functional group having one of following general formulae:
wherein A
1
, A
2
, A
3
, A
4
, A
5
, is independently selected from H, halogen such as F, Cl, Br or I, CF
3
, alkyl, preferably C
1
-C
4
alkyl, nitro, nitrile, alkoxy, preferably C
1
-C
4
alkoxy, halogenated (such as F, Cl, Br and I) alkyl, preferably halogenated C
1
-C
4
alkyl, halogenated (such as F, Cl, Br and I) alkoxy, preferably halogenated C
1
-C
4
alkoxy, phenyl, and halogenated (such as F, Cl, Br and I phenyl;
R2 is H or protected or unprotected side chain of natural or unnatural α-amino acid; and B is a natural or unnatural nucleobase, wherein when said nucleobase has an exocyclic amino function, said function is protected by protecting group which is labile to acids but stable to weak to medium bases in the presence of thiol.
该应用程序涉及通式(I)的单体,用于制备PNA(肽核酸)寡聚体,并提供了预定义序列PNA寡聚体和随机序列PNA寡聚体的合成方法:
其中E是硫或氧;J是氮或C—R′;R1、R′独立地为H、卤素、烷基、硝基、腈、烷氧基、卤代烷基、卤代烷氧基或具有以下一般式之一的功能基:
其中A1、A2、A3、A4、A5独立地选自H、卤素(如F、Cl、Br或I)、CF3、烷基,优选为C1-C4烷基、硝基、腈、烷氧基,优选为C1-C4烷氧基、卤代(如F、Cl、Br和I)烷基,优选为卤代的C1-C4烷基、卤代(如F、Cl、Br和I)烷氧基,优选为卤代的C1-C4烷氧基、苯基和卤代(如F、Cl、Br和I)苯基;R2为H或天然或非天然α-氨基酸的保护或未保护侧链;B为天然或非天然核苷碱,其中当所述核苷碱具有外环氨基功能时,所述功能由对酸敏感但在巯基存在下对弱至中等碱稳定的保护基保护。