N-(2-(5-methoxy-1-methyl-2-oxoindolin-3-yl)ethyl)-4-methylbenzenesulfonamide 、
ethyl 5-acetoxypenta-2,3-dienoate 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以93%的产率得到ethyl 2-(5'-methoxy-1'-methyl-2'-oxo-1-tosyl-1,2,3,5-tetrahydrospiro[azepine-4,3'-indolin]-7-yl)acetate