2-benzyl 1-tert-butyl (2S)-4,6-dioxo-1,2-piperidinedicarboxylate 、
对甲苯磺酰氯 以
ethyl acetate heptane 为溶剂,
以to afford the title compound as a yellow oil Rf=0.64 (EtOAc-heptane 1:1)的产率得到(S)-6-oxo-4-(toluene-4-sulfonyloxy)-3,6-dihydro-2H-pyridine-1,2-dicarboxylic acid 2-benzyl ester 1-tert-butyl ester