5-Chloromethyl-2-isopropyloxazole 、
2-(bromomethyl)tetrahydro-2H-pyran 、
6’H-spiro[indoline-3,7’-[1,3]dioxolo[4,5-f]benzofuran]-2-one 、 5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one 以1′-[(2-isopropyl-1,3-oxazol-5-yl)methyl]spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one was obtained (11%) as a colorless solid的产率得到1'-[(2-isopropyl-1,3-oxazol-5-yl)methyl]spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one