A novel pyrimidine nucleoside compound represented by the following formula (1):
(wherein one of X and Y represents a cyano group, and the other represents a hydrogen atom; one of R
1
and R
2
represents a hydrogen atom, a carbonyl group having a C1-C6 alkyl group which has been mono-substituted by an amino group, or a group represented by (R
3
)(R
4
)(R
5
)Si—, and the other represents a silyl group represented by (R
6
)(R
7
)(R
8
)Si—, or R
1
and R
2
together form a 6-membered cyclic group represented by —Si (R
9
)(R
10
)—; R
3
, R
4
, R
5
, R
6
, R
7
, and R
8
each represent an alkyl group, a cyclic alkyl group, an aryl group, or an alkyl group which has been substituted by one or two aryl groups; and R
9
and R
10
each represent an alkyl group)
or a salt thereof. The novel pyrimidine nucleoside compound exhibits excellent anti-tumor effect as compared with existing pyrimidine nucleoside compounds.
以下是一种新型
嘧啶核苷化合物的
化学式(1):(其中X和Y中的一个代表
氰基,另一个代表氢原子;R1和R2中的一个代表氢原子,具有C1-C6烷基的羰基基团,该烷基已被
氨基基团单取代,或由(R3)(R4)(R5)Si-表示的基团,另一个代表由(R6)(R7)(R8)Si-表示的
硅基团,或R1和R2共同形成由-Si(R9)(R10)-表示的6元环基团;R3、R4、R5、R6、R7和R8各自代表烷基、环烷基、芳基或已被一个或两个芳基取代的烷基;R9和R10各自代表烷基),或其盐。该新型
嘧啶核苷化合物与现有的
嘧啶核苷化合物相比具有出色的抗肿瘤效果。