3-Bromo-2-[(2-ethyl-butyryl)-hydrazono]-propionic acid ethyl ester 在
sodium carbonate 、
2-甲基-2-丙基[(E)-2-乙酰氨基乙烯基]氨基甲酸酯 作用下,
以
乙腈 为溶剂,
反应 16.0h,
生成 (5S,6S)-6-Acetylamino-5-tert-butoxycarbonylamino-1-(2-ethyl-butyryl)-1,4,5,6-tetrahydro-pyridazine-3-carboxylic acid ethyl ester 、 (5S,6S)-5-Acetylamino-6-tert-butoxycarbonylamino-1-(2-ethyl-butyryl)-1,4,5,6-tetrahydro-pyridazine-3-carboxylic acid ethyl ester 、 (2E,6E)-1,5-Bis-(2-ethyl-butyryl)-1,4,5,8-tetrahydro-[1,2,5,6]tetrazocine-3,7-dicarboxylic acid diethyl ester