2-(tetrahydropyrimidin-2(1H)-ylidene)-1-(p-tolyl)ethan-1-one 、
2-(3-oxoisobenzofuran-1(3H)-ylidene)malononitrile 以
N,N-二甲基甲酰胺 为溶剂,
以90%的产率得到6'-amino-9'-(p-methylbenzoyl)-3-oxo-1',2',3',4'-tetrahydro-3H-spiro[isobenzofuran-1,8'-pyrido[1,2-a]pyrimidine]-7'-carbonitrile