(-)-(5R,6R)-5-Acetoxy-6-(acetoxymethyl)-5,6-dihydro-2H-pyran-2-one 、
1-乙基-1H-吲哚-2,3-二酮 、
肌氨酸 以
甲苯 为溶剂,
反应 12.0h,
以84%的产率得到((3S,3a'S,6'R,7'R,7a'R)-7'-acetoxy-1-ethyl-2'-methyl-2,4'-dioxo-1',3a',4',6',7',7a'-hexahydro-2'H-spiro[indoline-3,3'-pyrano[3,4-c]pyrrol]-6'-yl)methyl acetate