Microwave-Assisted Palladium-Catalyzed Phosphonium Coupling of 2(1<i>H</i>)-Pyrazinones
作者:Vaibhav P. Mehta、Sachin G. Modha、Erik V. Van der Eycken
DOI:10.1021/jo9024754
日期:2010.2.5
An expedient route for the synthesis of differently substituted 2(1H)-pyrazinones applying a microwave-assistedpalladium-catalyzed phosphonium coupling procedure is reported. The method has also been successfully extended to some other tautomerizable heterocycles for efficient C−C cross-coupling.
An Expeditious Route toward Pyrazine-Containing Nucleoside Analogues
作者:Sachin G. Modha、Jalpa C. Trivedi、Vaibhav P. Mehta、Denis S. Ermolat’ev、Erik V. Van der Eycken
DOI:10.1021/jo102089h
日期:2011.2.4
An improved and convenient methodology for the synthesis of asymmetrically substituted pyrazines starting from 3,5-dichloropyrazin-2(1H)-ones has been elaborated. Several nucleoside analogues have been synthesized containing the pyrazine core as the organic base coupled with the sugar via a triazole linkage. The beneficial effect of microwave irradiation throughout the sequence has been demonstrated.