Nucleotide compound, nucleotide block oligonucleotide, and method for producing them
申请人:Toagosei Company, Ltd.
公开号:US06380378B1
公开(公告)日:2002-04-30
Novel nucleotide compounds represented by the formula (I)
wherein R1 represents a protective group or a PEG bearing organic group; R2, R2′, R2″, R3, R3′ and R3″ each represents a hydrogen atom or an alkyl, cycloalkyl, aryl or aralkyl group which may contain a hetero-atom; B1, B2, B3 and B4 each represents a base, if necessary, protected by a protective group common in nucleotide chemistry or by a PEG bearing organic group; X, X′ and X″ each represents an oxygen atom or a sulfur atom; Y represents an azolyl group, a mono- or di-alkylamino group or a saturated nitrogenous heterocyclic ring; A1, A2, A3 and A4 each represents a hydrogen atom, a hydroxyl group, an alkoxy group or a trialkylsilyloxy group; and m and n each represents 0 or an integer of 1 to 100. The nucleotide of the formula (I) can be used as it is in a reaction mixture for further reaction with 3′-O- and 5′-O-unprotected nucleoside or nucleotide of the formula (II) to yield a nucleotide block or oligonucleotide, and thus is useful as in situ DNA synthesis reagents.
根据公式(I)表示的新型核苷酸化合物:
其中R1代表保护基团或携带有机基团的聚乙二醇;R2、R2′、R2″、R3、R3′和R3″每个代表氢原子或可能含有杂原子的烷基、环烷基、芳基或芳烷基团;B1、B2、B3和B4每个代表一个碱基,如有必要,由核苷酸化学中常见的保护基团或携带有机基团的聚乙二醇保护;X、X′和X″每个代表氧原子或硫原子;Y代表唑基团、单烷基或二烷基氨基团或饱和氮杂环;A1、A2、A3和A4每个代表氢原子、羟基、烷氧基或三烷基硅氧基;m和n每个代表0或1到100的整数。公式(I)的核苷酸可以以其本身的形式用于反应混合物中,与3′-O-和5′-O-未保护的公式(II)的核苷或核苷酸进一步反应,产生核苷酸块或寡核苷酸,因此作为原位DNA合成试剂非常有用。