申请人:Koizumi Makoto
公开号:US20050261235A1
公开(公告)日:2005-11-24
A 2-5A analog represented by the formula (1):
wherein m is 0 or 1; n is 0 to 2; R
1
represents an alkoxy group having from 1 to 6 carbon atoms which may be substituted, an unprotected mercapto group, a mercapto group protected by a nucleic acid synthesis protecting group, or an alkylthio group having from 1 to 4 carbon atoms which may be substituted; R
2
, R
3
, R
4
, R
5
and R
6
represent an unprotected hydroxyl group, a hydroxyl group protected by a nucleic acid synthesis protecting group, an alkoxy group having from 1 to 6 carbon atoms which may be substituted, an unprotected mercapto group, a mercapto group protected by a nucleic acid synthesis protecting group, or an alkylthio group having from 1 to 4 carbon atoms which may be substituted; R
7
represents an oxygen atom, or a —O(CH
2
CH
2
O)q-group, wherein q is 2 to 6; R
8
represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms which may be substituted, or a 5′-phosphorylated oligonucleotide analog which has one hydroxyl group removed from the 5′-phosphoric acid group; E
1
, E
2
, E
3
and E
4
represent a naturally occurring or modified nucleic acid unit, or a pharmacologically acceptable salt thereof.
一种由公式(1)表示的2-5A模拟物,其中m为0或1;n为0至2;R1表示具有1至6个碳原子的烷氧基,可以被取代,未保护的巯基,通过核酸合成保护基保护的巯基,或者具有1至4个碳原子的烷硫基,可以被取代;R2、R3、R4、R5和R6表示未保护的羟基,通过核酸合成保护基保护的羟基,具有1至6个碳原子的烷氧基,可以被取代,未保护的巯基,通过核酸合成保护基保护的巯基,或者具有1至4个碳原子的烷硫基,可以被取代;R7表示氧原子,或者-O(CH2CH2O)q-基团,其中q为2至6;R8表示氢原子,具有1至6个碳原子的烷基,可以被取代,或者从5'-磷酸基团中去除一个羟基的5'-磷酸寡核苷酸类似物;E1、E2、E3和E4表示天然或修饰的核酸单元,或其药理学上可接受的盐。