A One-Pot, Copper-Catalyzed Cascade Route to 2-Indolyl-C-glycosides
作者:Parthasarathi Subramanian、Krishna P. Kaliappan
DOI:10.1002/ejoc.201201208
日期:2013.1
An efficient and high-yielding, one-pot, Cu-catalyzed synthesis of 2-indolyl-C-glycosides is delineated. The sequence involves a cascade Sonogashira type coupling and a hydroamination reaction between sugar-derived alkynes and N-tosyl-o-iodoaniline followed by removal of the N-tosyl group to provide a library of 2-indolyl-C-glycosides in moderate to excellent yields.
描述了一种高效且高产的单锅 Cu 催化合成 2-吲哚基-C-糖苷。该序列涉及级联 Sonogashira 型偶联和糖衍生的炔烃和 N-甲苯磺酰基-邻碘苯胺之间的加氢胺化反应,然后去除 N-甲苯磺酰基,以提供中等至优异的 2-吲哚基-C-糖苷库产量。
Synthesis of Triazole-Linked Oligonucleotides with High Affinity to DNA Complements and an Analysis of Their Compatibility with Biosystems
作者:Anna M. Varizhuk、Dmitry N. Kaluzhny、Roman A. Novikov、Alexandr O. Chizhov、Igor P. Smirnov、Andrey N. Chuvilin、Olga N. Tatarinova、Gleb Y. Fisunov、Galina E. Pozmogova、Vladimir L. Florentiev
DOI:10.1021/jo400651k
日期:2013.6.21
New oligonucleotide analogues with triazole internucleotide linkages were synthesized, and their hybridization properties were studied. The analogues demonstrated DNA binding affinities similar to those of unmodified oligonucleotides. The modification was shown to protect the oligonucleotides from nuclease hydrolysis. The modified oligonucleotides were tested as PCR primers. Modifications remote from the 3'-terminus were tolerated by polymerases. Our results suggest that these new oligonucleotide analogues are among the most promising triazole DNA mimics characterized to date.