1: 5-bromo-3-(4-chlorobut-2-enyl)-3-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecylsulfanyl)-6-methoxy-1,3-dihydroindol-2-one With samarium diiodide in tetrahydrofuran T=20°C; 0.333333 h; Inert atmosphere; 2: Isopropyl(H)=NBn in tetrahydrofuran T=80°C; Inert atmosphereSealed tube; diastereoselective reaction;