2-(氯甲基)-3-(三氟甲基)吡啶盐酸盐 、
2-(bromomethyl)tetrahydro-2H-pyran 、
5'-methyl-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one 、 5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one 以(5′-methyl-1′-{[3-(trifluoromethyl)pyridin-2-yl]methyl}-2,3-dihydrospiro[furo[2,3-g][1,4]-benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (62%) as a colorless solid的产率得到5'-methyl-1'-{[3-(trifluoromethyl)pyridin-2-yl]methyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one