A novel base-mediated intramolecular hydroamination to build fused heteroaryl pyrazinones
摘要:
Functionalized fused heteroaryl pyrazinones were built up through a novel DBU-catalyzed intramolecular hydroamination reaction of aryl(prop-2-yn-1-yl)-1H-heteroaryl-2-carboxamides. The nucleophilic addition afforded three isomers; two with an exo-cyclic double bond [cis (Z), trans (E)], and a third one with an endo-cyclic double bond. After the carboxamide deprotection, isomerization of the mixture under acidic conditions resulted in a unique isomer. (C) 2008 Elsevier Ltd. All rights reserved.
A novel base-mediated intramolecular hydroamination to build fused heteroaryl pyrazinones
摘要:
Functionalized fused heteroaryl pyrazinones were built up through a novel DBU-catalyzed intramolecular hydroamination reaction of aryl(prop-2-yn-1-yl)-1H-heteroaryl-2-carboxamides. The nucleophilic addition afforded three isomers; two with an exo-cyclic double bond [cis (Z), trans (E)], and a third one with an endo-cyclic double bond. After the carboxamide deprotection, isomerization of the mixture under acidic conditions resulted in a unique isomer. (C) 2008 Elsevier Ltd. All rights reserved.
A novel base-mediated intramolecular hydroamination to build fused heteroaryl pyrazinones
作者:Laura Llauger、Costanza Bergami、Olaf D. Kinzel、Samuele Lillini、Giovanna Pescatore、Caterina Torrisi、Philip Jones
DOI:10.1016/j.tetlet.2008.10.116
日期:2009.1
Functionalized fused heteroaryl pyrazinones were built up through a novel DBU-catalyzed intramolecular hydroamination reaction of aryl(prop-2-yn-1-yl)-1H-heteroaryl-2-carboxamides. The nucleophilic addition afforded three isomers; two with an exo-cyclic double bond [cis (Z), trans (E)], and a third one with an endo-cyclic double bond. After the carboxamide deprotection, isomerization of the mixture under acidic conditions resulted in a unique isomer. (C) 2008 Elsevier Ltd. All rights reserved.