作者:Marina Kovaliov、Meirav Segal、Bilha Fischer
DOI:10.1016/j.tet.2013.03.005
日期:2013.5
The synthesis and spectral properties of modified cytidine analogues are described here. To confer fluorescent properties, the cytidine fluorophore was extended by a cinnamyl moiety at the cytidine 5-position, (analogues 1a–c), or extended by a phenyl-imidazolo ring, (analogues 3a–d). Those compounds were synthesized via the Suzuki–Miyaura coupling reaction and via condensation of 5-amino-cytidine
此处描述了修饰的胞苷类似物的合成和光谱性质。为了赋予荧光特性,胞苷荧光团在胞嘧啶5位上通过肉桂基部分扩展(类似物1a – c),或在苯基咪唑环上扩展(类似物3a – d)。这些化合物分别通过Suzuki-Miyaura偶联反应和5-氨基胞苷与对位取代的苯甲醛的缩合反应合成。所有的类似物在蓝色区域为荧光(λ EM:402-436纳米)。在上述类似物中,对-CF 3-苯基-咪唑并胞苷3d被发现是一种很有前途的荧光探针,其量子产率比胞苷大7000倍(Φ = 0.617),并且红移约为。最大发射108 nm(411 nm)。其保留的Watson-Crick氢键键合面使3d可以与鸟苷特异性碱基配对,类似于胞苷。另外,苯基-咪唑并胞苷类似物优选反构象和C 3'-内切(N)糖折叠。这些特性使3d成为吸引人的荧光探针,可潜在地用于核酸化学的各个方面。