1-溴代异戊烷 、
2-溴甲基-5-三氟甲基呋喃 、
5,6-difluorospiro[1-benzofuran-3,3'-indol]-2'(1'H)-one 、 3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3'-indol]-2'(1H)-one 以5,6-difluoro-1′-(3-methylbutyl)spiro[1-benzofuran-3,3′-indol]-2′(1′H)-one was obtained (96%) as a pale yellow oil的产率得到5,6-difluoro-1'-(3-methylbutyl)spiro[1-benzofuran-3,3'-indol]-2'(1'H)-one