申请人:Teijin Limited
公开号:US04965350A1
公开(公告)日:1990-10-23
Pyridopyrimidine nucleotide derivatives expressed by formula (I), which are fluorescent and capable of forming base pairing with guanine or adenine, and oligo- or polynucleotide which have at least one of these derivatives in their molecules or at their molecular terminals: ##STR1## wherein X.sub.1 and X.sub.1 respectively represent ##STR2## (in which n indicates an integer of 0, 1, 2, or 3; however, in no case X.sub.1 and Y.sub.1 both indicate n=O); Z.sub.1 indicates a hydrogen atom or ##STR3## (in which n indicates an integer of 1, 2, or 3); W.sub.1 indicates a hydrogen atom or a hydroxyl group. As for R.sub.1 and R.sub.2, in case where R.sub.1 is an amino group or halogen, R.sub.2 indicates a single bond between the carbon atom at the 7-position and the nitrogen atom at the 8-position, and in case where R.sub.2 is a hydrogen atom or an lower alkyl group, R.sub.1 indicates a carbonyl bond ##STR4## formed with the carbon atom at the 7-position.
式(I)所表示的吡啶嘧啶核苷酸衍生物是荧光的,并能够与鸟嘌呤或腺嘌呤形成碱基配对,而具有这些衍生物之一的寡聚核苷酸或多聚核苷酸在其分子中或其分子末端至少有一个这些衍生物:其中X.sub.1和X.sub.1分别表示##STR2##(其中n表示0、1、2或3的整数;但在任何情况下,X.sub.1和Y.sub.1都不表示n=0);Z.sub.1表示氢原子或##STR3##(其中n表示1、2或3的整数);W.sub.1表示氢原子或羟基。至于R.sub.1和R.sub.2,在R.sub.1为氨基或卤素的情况下,R.sub.2表示7位碳原子和8位氮原子之间的单键,而在R.sub.2为氢原子或较低烷基的情况下,R.sub.1表示与7位碳原子形成的羰基键##STR4##。