ethyl 2-(2-oxo-1-(piperidin-4-yl)indolin-3-yl)acetate 、
1-methyl-2,3,8,8a-tetrahydrocyclopenta[ij]isoquinolin-7(1H)-one 在
titanium(IV) tetraethanolate 、 sodium cyanoborohydride 作用下,
以
四氢呋喃 为溶剂,
反应 9.0h,
以15%的产率得到ethyl 2-(1-(1-(1-methyl-1,2,3,7,8,8a-hexahydrocyclopenta[ij]isoquinolin-8-yl)piperidin-4-yl)-2-oxoindolin-3-yl)acetate