2-Formylamino-3-hydroxy-2-methyl-4-pentenoic acid methyl ester 、
二溴亚砜 、
亚磷酸三乙酯 以E-2-formylamino-2-methyl-5-diethylphosphono-3-pentenoic acid methyl ester is obtained in the form of a yellow oil的产率得到E-2-formylamino-2-methyl-5-diethylphosphono-3-pentenoic acid methyl ester