、 5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one 、
2-溴甲基-5-三氟甲基呋喃 、
5-(chloromethyl)-2-methoxypyrimidine 以7′-chloro-1′-((5-(trifluoromethyl)furan-2-yl)methyl)-5,6-dihydro-2H-spiro[benzofuro[6,5-b]furan-3,3′-indolin]-2′-one was obtained (30%) as a colorless solid的产率得到7'-chloro-1'-((5-(trifluoromethyl)furan-2-yl)methyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one