申请人:Sterling Winthrop, Inc.
公开号:US05576427A1
公开(公告)日:1996-11-19
Compounds of formula I; ##STR1## wherein R.sup.1 is hydrogen, or a blocking group that is compatible with oligonucleotide synthesis; R.sup.2 is hydrogen, nitro, lower alkyl amino, diloweralkyl amino or methyl; R.sup.3 is hydrogen or --P(R.sup.4)OR.sup.5 ; R.sup.4 is chlorine, 4-nitroimidazole, imidazole, tetrazole, triazole or di(lower-alkyl)amino-; R.sup.5 is methyl, 2-cyanoethyl or 2,2,2-trichloroethyl; n is from 0 to 2 X is oxygen, sulfur, or --NR.sup.6 ; R.sup.6 is hydrogen or lower alkyl; Q is chosen from the group consisting of ##STR2## R.sup.7 is lower-alkyl or loweralkyloxy methylene; and R.sup.8 is hydrogen, benzoyl, anisoyl, or lower-alkyl carbonyl and its pharmaceutically acceptable addition salts are nucleotide analogs. Modified oligonucleotides containing the nucleoside analogs of formula I are stable to nuclease degradation and are useful in inhibiting gene expression, in sequencing, and in mutagenesis.
公式I的化合物;其中R.sup.1是氢,或与寡核苷酸合成兼容的阻断基团;R.sup.2是氢,硝基,低碳基氨基,二低碳基氨基或甲基;R.sup.3是氢或--P(R.sup.4)OR.sup.5;R.sup.4是氯,4-硝基咪唑,咪唑,四唑,三唑或二(低碳基)氨基-;R.sup.5是甲基,2-氰乙基或2,2,2-三氯乙基;n为0到2;X为氧,硫或--NR.sup.6;R.sup.6是氢或低碳基;Q选择自##STR2##R.sup.7是低碳基或低碳基氧甲基;R.sup.8是氢,苯甲酰,苯甲酰,或低碳基羰基及其药用可接受的加盐物是核苷酸类似物。含有公式I的核苷酸类似物的修饰寡核苷酸对核酸酶降解稳定,并且在抑制基因表达、测序和诱变中是有用的。