反应详情

By reaction of the 2-formylamino-3-hydroxy-4-phenyl-4-pentenoic acid methyl ester with thionyl bromide and subsequent treatment with triethyl phosphite in a manner analogous to that described in Example 1, and after chromatography (silica gel; ethyl acetate/hexane 4:1), E-2-formylamino-4-phenyl-5-diethylphosphono-3-pentenoic acid methyl ester is obtained in the form of a colourless oil. 1H-NMR (CDCl3): 2.98 (d, 2H,C(5)-H); 5.03 (dd, 1H, C(2)-H); 5.77 (dd, 1H, C(3)-H).