8-[(Z)-3-Dimethylamino-2-(2,4-dinitro-phenyl)-prop-2-en-(E)-ylidene]-2,4-diphenyl-5,6,7,8-tetrahydro-chromenylium; perchlorate 在
sodium carbonate 作用下,
以
乙腈 为溶剂,
以22%的产率得到(E)-2-(2,4-Dinitro-phenyl)-3-(2,4-diphenyl-6,7-dihydro-5H-chromen-8-yl)-propenal