New use of bis(benzotriazolyl)-1,2-(dialkylamino)ethanes for the synthesis of 2-H-3-dialkylamino imidazo[1,2-a]pyrazine derivatives
作者:Joaquín Pastor、Sonsoles Rodríguez-Arístegui、Ana Isabel Hernández、Carmen Varela、Antonio Salgado、Sonia Martínez
DOI:10.1016/j.tetlet.2011.12.077
日期:2012.2
First direct synthesis of 2-H-3-N-dialkyl-imidazo[1,2-a]pyrazines is described. This approach makes use of accessible substituted pyrazines and the assistance of benzotriazole. In such a manner we accomplished the introduction of cyclic amines at C-3 of the scaffold in a convenient formal cyclisation procedure. Detailed examples and utility of this approach are presented herein. (C) 2011 Elsevier Ltd. All rights reserved.