Junfeng Zhao, C. Xie, M. Ding
Jul 22, 2005
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0
Influential Citations
3
Citations
Journal
Synthesis
Abstract
The carbodiimides 2, obtained from aza-Wittig reactions of iminophosphorane I with aromatic isocyanates, reacted with secondary amines or ROH to give 5-dialkylamino or 5-alkoxy 7H-1,2,3-triazolo[4,5-d]pyrimidin-7-ones 4 in the presence of a catalytic amount of EtONa in a mixed solvent (CH 2 Cl 2 -ROH). Reactions of 2 with phenols in presence of catalytic potassium carbonate in MeCN gave 5-aryloxy-7H-1,2,3-triazolo[4,5-d]pyrimidin-7-ones 4 in satisfactory yields.