Water-Soluble Pd–Imidate Complexes: Broadly Applicable Catalysts for the Synthesis of Chemically Modified Nucleosides via Pd-Catalyzed Cross-Coupling
作者:Vijay Gayakhe、Ajaykumar Ardhapure、Anant R. Kapdi、Yogesh S. Sanghvi、Jose Luis Serrano、Luis García、Jose Pérez、Joaquím García、Gregorio Sánchez、Christian Fischer、Carola Schulzke
DOI:10.1021/acs.joc.5b02475
日期:2016.4.1
A broadly applicable catalyst system consisting of water-soluble Pd–imidate complexes has been enployed for the Suzuki–Miyaura cross-coupling of four different nucleosides in water under mild conditions. The efficient nature of the catalyst system also allowed its application in developing a microwave-assisted protocol with the purpose of expediting the catalytic reaction. Preliminary mechanistic studies
bases paired with the abasic sites in TFOs in a space-fitting manner, the stability of the resulting triplexes significantly increased. The recognition of C3 toward dC5Ars was selective because of the stacking interactions between their aromatic part and the nucleobases flanking the abasic site. These results indicate the potential utility of new nucleotide triplets for DNA triplexformation, which
开发了适用于 DNA 三链体形成的新核苷酸对。我们设计了包含 5-芳基脱氧胞苷衍生物 (dC5Ars) 和环状脱氧胞苷衍生物 dCPPP 和 dCPPI 的寡核苷酸,它们具有扩大的芳族区域,作为第二条链。作为配对伙伴,选择了两种类型的无碱基残基(C3:丙烯接头,phi:无碱基碱基)。结论是,当 5-芳基修饰的胞嘧啶碱基以空间拟合的方式与 TFO 中的无碱基位点配对时,所得三链体的稳定性显着增加。C3 对 dC5Ars 的识别是有选择性的,因为它们的芳香部分和无碱基位点侧翼的核碱基之间存在堆积相互作用。这些结果表明新的核苷酸三联体在 DNA 三联体形成中的潜在效用,