One-step construction of 2-substituted-4,6-diazaindoles from carboxylic acid derivatives
作者:Jinhua J. Song、Zhulin Tan、Jonathan T. Reeves、Daniel R. Fandrick、Heewon Lee、Nathan K. Yee、Chris H. Senanayake
DOI:10.1016/j.tetlet.2009.04.080
日期:2009.7
Treatment of unprotected 5-amino-4-methylpyrimidine (2) with n-BuLi gave dianion 3. Direct condensation of the dianion with various carboxylic acid derivatives furnished a range of 2-substituted-4,6-diazaindoles in good yields in one step without the need for protecting groups or oxidation-state adjustment.