(S)-2-tert-butoxycarbonylamino-3-methyl-butyric acid, 3-{3-tert-butyl-5-[(E)-2-(4-methanesulfonylamino-phenyl)-vinyl]4-methoxy-phenyl}-5-fluoro-2-oxo-2H-pyridin-1-ylmethyl ester 、
盐酸1,4-二恶烷 在
二氯甲烷 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以afforded 698 g of II-7 as a white powder的产率得到(S)-2-amino-3-methyl-butyric acid 3-{3-tert-butyl-5-[(E)-2-(4-methanesulfonylamino-phenyl)-vinyl]-4-methoxy-phenyl}-5-fluoro-2-oxo-2H-pyridin-1-ylmethyl ester