1-<(2,2,2-trichloroethoxy)carbonyl>-1,2-dihydropyridine 、
Ethyl 2-(1-benzenesulfonylindol-2-yl)-acrylate 反应 48.0h,
以31%的产率得到(1S,4S,6S)-6-(1-Benzenesulfonyl-1H-indol-2-yl)-2-aza-bicyclo[2.2.2]oct-7-ene-2,6-dicarboxylic acid 6-ethyl ester 2-(2,2,2-trichloro-ethyl) ester