An effective method has been developed for synthesis of neutral merocyanine dye 4 from (4-nitrophenyl)malondialdehyde. Merocyanine 4 was used as a basic building block for preparation of unsymmetric cyanine dyes 9 and 10, both derived from the same aromatic malondialdehyde. With the cyanine 10, pH-dependent affinity to DNA has been studied. Unsymmetric cyanine dye 10 has been compared with symmetric dye 8. The corresponding binding constants (K) have been calculated for various pH.
已经开发出一种有效的方法,可以从(4-硝基苯基)丙二醛合成中性美洛氰染料4。美洛氰4被用作准备非对称青菁染料9和10的基本构建模块,这两种染料都源自同一芳香族丙二醛。使用青菁10,研究了其对DNA的pH依赖亲和力。将非对称青菁染料10与对称染料8进行了比较。已经计算了各种pH下的相应结合常数(K)。