(1R,3S,2'S)-1-<2'-(tert-butoxycarbonyl)amino-2'-carboxy>ethyl-3-methoxycarbonyl-1,2,3,4-tetrahydro-β-carboline 以
xylene 为溶剂,
以48%的产率得到(2S,5S,11bR)-2-(tert-butoxycarbonyl)amino-5-methoxycarbonyl-3-oxo-2,3,5,6,11,11b-hexahydro-1H-indolizino<8,7-b>indole