4,5,7,8-tetramethoxy-isochromane-1,3-dione 、
(8S)-4'-(benzenesulfinyl)-1,9-dimethoxy-3-methylspiro[6,7-dihydrocyclopenta[g]isoquinoline-8,2'-cyclopent-4-ene]-1',3'-dione 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
反应 8.0h,
以87%的产率得到(8R)-4'-hydroxy-1,5',6',8',9,9'-hexamethoxy-3-methylspiro[6,7-dihydrocyclopenta[g]isoquinoline-8,2'-cyclopenta[b]naphthalene]-1',3'-dione