A novel approach to phosphonyl-substituted heterocyclic system(I)
作者:Rongjian Lu、Huazheng Yang
DOI:10.1016/s0040-4039(97)01111-8
日期:1997.7
The synthesis of α,α-dicyano (α-cyano-α-ethoxycarbonyl) phosphonyl/ S-methyl ketene acetals 2 is reported and the utility of 2 as synthetic equivalent for 1-phosphonyl-2-cyanoethene cation (I) is demonstrated. Phosphonyl-substituted pyrazoles, isoxazoles and pyrimidines have been synthesized through cyclization reaction of 2 with various binucleophilic reagents.