L-2-tert-butoxycarbonylamino-3-methyl-butyric acid 3-[2,6-dichloro-4-(6-cyano-3,5-dioxo-4,5-dihydro-3H-[1,2,4]triazin-2-yl)-phenoxy]-5-isopropyl-6-oxo-6H-pyridazin-1-ylmethyl ester 在
盐酸 作用下,
以
1,4-二氧六环 、
乙酸乙酯 为溶剂,
反应 4.0h,
以72.6%的产率得到(S)-2-amino-3-methyl-butyric acid 3-[2,6-dichloro-4-(6-cyano-3,5-dioxo-4,5-dihydro-3H-[1,2,4]triazin-2-yl)-phenoxy]-5-isopropyl-6-oxo-6H-pyridazin-1-ylmethyl ester hydrochloride