3-(4,5-dimethyl-3,6-dioxocyclohex-1,4-dien-1-yl)-3-methylbutanoic acid 、 ethyl 2-amino-6-diazo-5-oxohexanoate 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 4.5h,
以51%的产率得到(S)-6-diazo-2-(3-(4,5-dimethyl-3,6-dioxocyclohexyl-1,4-dien-1-yl)-3-methylbutyramido)-5-oxohexanoic acid ethyl ester