Efficient synthesis of 2,6-disubstituted-5-hydroxy-3-oxo-2,3-dihydro-pyridazine-4-carboxylic acid ethyl esters
作者:Douglas E. Murphy、Peter S. Dragovich、Benjamin K. Ayida、Thomas M. Bertolini、Lian-Sheng Li、Frank Ruebsam、Nebojsa S. Stankovic、Zhongxiang Sun、Jingjing Zhao、Yuefen Zhou
DOI:10.1016/j.tetlet.2007.11.187
日期:2008.1
boxylic acidethylesters (6-substituted-5-hydroxy-3(2H)-pyridazinone-4-carboxylic acidethylesters). These compounds are shown to undergo selective alkylation at the 2-position in moderate to good yields (19–77%) to afford 2,6-disubstituted-5-hydroxy-3-oxo-2,3-dihydro-pyridazine-4-carboxylic acidethylesters (2,6-disubstituted-5-hydroxy-3(2H)-pyridazinone-4-carboxylic acidethylesters).