Regioselective synthesis of novel nitroso-pyrazolylquinoxalines <i>via</i> HOAc-mediated cyclocondensation of 2-hydroxyimino-1,3-diketones with hydrazinylquinoxalines
作者:Pavel S. Bobrov、Sergei D. Kirik、Ivan V. Peterson、Georgii A. Suboch
DOI:10.1039/d3ob00356f
日期:——
describes the regioselectivesynthesis of novel nitroso-pyrazolylquinoxalines via cyclocondensation of 2-hydroxyimino-1,3-diketones with hydrazinylquinoxalines. Of note, this is the first time that 2-hydroxyimino-1,3-diketones are used as electrophilic reagents to cyclocondensation with hetarylhydrazines. The cyclocondensation proceeded through a hydrazone intermediates formation. A series of novel nitroso-substituted