盐酸二甲胺 、
(R)-1-Boc-3-氨基吡咯烷 、
1'-[(5-bromopyridin-2-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one 、 1'-(4-bromobenzyl)-5,6-difluorospiro[1-benzofuran-3,3'-indol]-2'(1'H)-one 以1′-{[5-(dimethylamino)pyridin-2-yl]methyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (23%) as a beige solid的产率得到1'-{[5-(dimethylamino)pyridin-2-yl]methyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one