2-(imidazolidin-2-ylidene)-1-(4-methoxyphenyl)ethan-1-one 、
2-(3-oxoisobenzofuran-1(3H)-ylidene)malononitrile 以
N,N-二甲基甲酰胺 为溶剂,
以96%的产率得到5-amino-8-(p-methoxybenzoyl)-3'-oxo-2,3-dihydro-1H,3'H-spiro[imidazo[1,2-a]pyridine-7,1'-isobenzofuran]-6-carbonitrile