Tandem aza-wittig reaction/electrocyclic ring-closure a facile entry to the synthesis of fused pyrimidines: Preparation of pyrazolo[3,4-d] and 1,2,3-triazolo[4,5-d]pyrimidine derivatives.
作者:Pedro Molina、Antonio Arques、Ma Victoria Vinader、Jan Becher、Klaus Brondum
DOI:10.1016/s0040-4039(00)96536-5
日期:1987.1
The aza-Wittig reaction of iminophosphoranes derived from 5-azido-4-formyl azoles, with isocyanates or carbon disulfide, leads to functionalized fused pyrimidines.
Fused pyrimidines by a tandem aza-Wittig/electrocyclic ring closure strategy: synthesis of pyrazolo[3,4-d]pyrimidine, [1,2,3]triazolo[4,5-d]pyrimidine, and thiazolo[4,5-d]pyrimidine derivatives
作者:Pedro Molina、Antonio Arques、Maria Victoria Vinader、Jan Becher、Klaus Brondum