5-(4-ethylbenzylidene)pyrimidine-2,4,6(1H,3H,5H)-trione 、 1-(4-methoxyphenyl)-N-(5-methyl-1H-pyrazol-3-yl)methanimine 以
N,N-二甲基甲酰胺 为溶剂,
反应 0.5h,
以75%的产率得到4-(4-ethylphenyl)-6-(4-methoxyphenyl)-3-methyl-1H-1,4,6,7-tetrahydro-2'H-spiro[pyrazolo[3,4-b]pyridine-5,5'-pyrimidine]-2',4',6'(1'H,3'H)-trione