(4RS,10bRS)-1,3-dioxo-2-phenyl-2,3,6,10b-tetrahydro-1H,4H-2,3a,6,10c-tetraaza-cyclopenta[c]fluorene-4,5-dicarboxylic acid dimethyl ester 以
氯仿 为溶剂,
反应 1.0h,
以70%的产率得到(4RS,5RS)-1,3-dioxo-2-phenyl-2,3,5,6-tetrahydro-1H,4H-2,3a,6,10c-tetraaza-cyclopenta[c]fluorene-4,5-dicarboxylic acid dimethyl ester