methyl 6'-bromo-7'-[2-(dimethylamino)ethylamino]-4,4',9',10-tetrahydroxy-5',8',9-trioxospiro[3,4-dihydropyrano[4,3-g]chromene-2,2'-3H-benzo[f][1]benzofuran]-7-carboxylate 在
palladium on activated charcoal
氢气 、
sodium acetate 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 2.0h,
以45%的产率得到methyl 7'-[2-(dimethylamino)ethylamino]-4,4',9',10-tetrahydroxy-5',8',9-trioxospiro[3,4-dihydropyrano[4,3-g]chromene-2,2'-3H-benzo[f][1]benzofuran]-7-carboxylate