3-cyano-4,5,7-trimethoxy-1(3H)-isobenzofuranone 、
1',9'-dimethoxy-3'-((1E,3E)-penta-1,3-dien-1-yl)-6',7'-dihydrospiro[cyclopentane-1,8'-cyclopenta[g]isoquinolin]-3-ene-2,5-dione 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以63%的产率得到1,9-dimethoxy-3-[(1E,3E)-penta-1,3-dienyl]-4'-(4,6,7-trimethoxy-3-oxo-1H-2-benzofuran-1-yl)spiro[6,7-dihydrocyclopenta[g]isoquinoline-8,2'-cyclopentane]-1',3'-dione