Synthesis and fungicidal activity of 3,5-dichloropyrazin-2(1H)-one derivatives
摘要:
We synthesized a family of 3,5-dichloropyrazin-2(1H)-one derivatives and assessed their in vitro fungicidal activity against Candida albicans. Compounds 11 and 20 were most active against C. albicans and induced accumulation of reactive oxygen species in this pathogen. Using a genome-wide approach in the yeast Saccharomyces cerevisiae, we demonstrated that genes involved in vacuolar functionality and DNA-related functions play an important role in cellular mechanisms underlying the fungicidal activity of these compounds. (C) 2009 Elsevier Ltd. All rights reserved.
Alkylation of 3,5-dichloro-2(1H)-pyrazinones using malonate esters
作者:Nigam M. Mishra、Vsevolod A. Peshkov、Olga P. Pereshivko、Sachin G. Modha、Erik V. Van der Eycken
DOI:10.1016/j.tetlet.2012.06.080
日期:2012.8
3-alkylation of 3,5-dichloro-2(1H)-pyrazinones with various malonate esters is described. The method constitutes a simple example of a C–C bond forming process at the 3-position of the pyrazinone core allowing to attain 3-substituted pyrazinones in good to high yields. 3-Alkylation of 3,5-dichloro-2(1H)-pyrazinones with acetoacetic ester was accompanied by further retro-Claisen fragmentation.
<i>N</i>-Heterocyclic Carbene Catalyzed Aroylation of 3,5-Dichloro-2(1<i>H</i>)-pyrazinones
作者:Vaibhav P. Mehta、Ajendra kumar Sharma、Sachin G. Modha、Sweta Sharma、Thirumal Meganathan、Virinder Singh Parmar、Erik Van der Eycken
DOI:10.1021/jo200155n
日期:2011.4.15
The N-heterocyclic carbene catalyzed chemoselective C3-aroylation of 3,5-dichloro-2(1H)-pyrazinones with various aldehydes is reported. We herein describe results of this remarkable mild and efficient procedure.