Design, Synthesis, and Evaluation of Novel Biarylpyrimidines: A New Class of Ligand for Unusual Nucleic Acid Structures
摘要:
Biarylpyrimidines are characterized as selective ligands for higher-order nucleic acid structures. A concise and efficient synthesis has been devised incorporating Suzuki biaryl cross-coupling of dihalopyrimidines. Two ligand series are described based on the parent thioether 4,6-bis[4-[[2-(dimethylamino)ethyl]mercapto]phenyl] pyrimidine (1a) and amide 4,6-bis(4[(2-(dimethylamino) ethyl) carboxamido] phenyl) pyrimidine (2a) compounds. In UV thermal denaturation studies with the poly(dA),[poly(dT)](2) triplex structure, thioethers showed stabilization of the triplex form (Delta T-m <= 20 degrees C). In contrast, amides showed duplex stabilization (Delta T-m <= 15 degrees C) and either negligible stabilization or specific destabilization (Delta T-m = 5 degrees C) of the triplex structure. Full spectra of nucleic acid binding preferences were determined by competition dialysis. The strongest interacting thioether bound preferentially to the poly(dA)(.)[poly(dT)](2) triplex, Kapp) 1.6 x 10(5) M-1 (40 x Kapp for CT DNA duplex). In contrast, the strongest binding amide selected the (T(2)G(20)T(2)) 4 quadruplex structure, Kapp) 0.31 x 10(5) M-1 (6.5 x K-app for CT DNA duplex).
Design, Synthesis, and Evaluation of Novel Biarylpyrimidines: A New Class of Ligand for Unusual Nucleic Acid Structures
作者:Richard T. Wheelhouse、Sharon A. Jennings、Victoria A. Phillips、Dimitrios Pletsas、Peter M. Murphy、Nichola C. Garbett、Jonathan B. Chaires、Terence C. Jenkins
DOI:10.1021/jm060315a
日期:2006.8.1
Biarylpyrimidines are characterized as selective ligands for higher-order nucleic acid structures. A concise and efficient synthesis has been devised incorporating Suzuki biaryl cross-coupling of dihalopyrimidines. Two ligand series are described based on the parent thioether 4,6-bis[4-[[2-(dimethylamino)ethyl]mercapto]phenyl] pyrimidine (1a) and amide 4,6-bis(4[(2-(dimethylamino) ethyl) carboxamido] phenyl) pyrimidine (2a) compounds. In UV thermal denaturation studies with the poly(dA),[poly(dT)](2) triplex structure, thioethers showed stabilization of the triplex form (Delta T-m <= 20 degrees C). In contrast, amides showed duplex stabilization (Delta T-m <= 15 degrees C) and either negligible stabilization or specific destabilization (Delta T-m = 5 degrees C) of the triplex structure. Full spectra of nucleic acid binding preferences were determined by competition dialysis. The strongest interacting thioether bound preferentially to the poly(dA)(.)[poly(dT)](2) triplex, Kapp) 1.6 x 10(5) M-1 (40 x Kapp for CT DNA duplex). In contrast, the strongest binding amide selected the (T(2)G(20)T(2)) 4 quadruplex structure, Kapp) 0.31 x 10(5) M-1 (6.5 x K-app for CT DNA duplex).