(S)-1-(6-chloro-5-fluoro-1H-indol-3-yl)propan-2-amine ((1S,4R)-7,7-dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonate 、
5-氯靛红 在
三乙胺 、
D(+)-10-樟脑磺酸 作用下,
以
异丙醇 为溶剂,
反应 17.0h,
以86.3%的产率得到(3R,3'S)-5,7'-dichloro-6'-fluoro-3'-methyl-2',3',4',9'-tetrahydrospiro[indoline-3,1'-pyrido[3,4-b]indol]-2-one ((1S,4R)-7,7-dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonate