2,3,6, 7-tetrahydrospiro[furo[3,2-g]chromene-5,3'-indol]-2'(1'H)-one 、 、
丙酮 、
2-溴甲基-5-三氟甲基呋喃 、
2-(bromomethyl)tetrahydro-2H-pyran 以
丁酮 为溶剂,
以1′-{[5-(trifluoromethyl)furan-2-yl]methyl}-2,3,6,7-tetrahydrospiro[furo[3,2-g]chromene-5,3′-indol]-2′(1′H)-one was obtained (43%) as a colorless solid的产率得到1'-{[5-(trifluoromethyl)furan-2-yl]methyl}-2,3,6,7-tetrahydrospiro[furo[3,2-g]chromene-5,3'-indol]-2'(1'H)-one