3-methyl-5-morpholino-1-phenyl-1H-pyrazole-4-carbaldehyde 、
1,3-二甲基巴比妥酸 以
正丁醇 为溶剂,
反应 90.0h,
以60%的产率得到(+/-)-1',3,3'-trimethyl-1-phenyl-1,4,5a,6,8,9-hexahydro-2'H-spiro[pyrazolo[4',3':5,6]pyrido[2,1-c][1,4]oxazine-5,5'-pyrimidine]-2',4',6'(1'H,3'H)-trione