(E)-6-(4-chloro-2-fluoro-3-methoxyphenyl)-2,4-dioxo-hex-5-enoic acid ethyl ester 、
乙酸铵 以
乙醇 为溶剂,
以to yield (2Z,5E)-2-amino-6-(4-chloro-2-fluoro-3-methoxyphenyl)-4-oxo-hexa-2,5-dienoic acid ethyl ester (10; 38.5 g, 92%, 90% pure by 1H NMR spectroscopy) as a dark orange solid的产率得到(2Z,5E)-2-amino-6-(4-chloro-2-fluoro-3-methoxyphenyl)-4-oxo-hexa-2,5-dienoic acid ethyl ester