The invention relates to a process for the preparation of 3-cyano-3-4-[(4-[(2Z)-2-(methoxyimino)-2-phenylethyl] oxy} benzyl) oxy] phenyl} propanoic acid or salts thereof. In one form, the invention relates to the process for the preparation of (-)-3-cyano-3-4-[(4-[(2Z)-2-(methoxyimino)-2-phenylethyl]oxy}benzyl)oxy]phenyl}propanoic acid and conversion of the (-)-enantiomer to the sodium salt, sodium 3-cyano-3-4-[(4-[(2Z)-2-(methoxyimino)-2-phenylethyl]oxy}benzyl)oxy] phenyl}propanoate.
该发明涉及一种制备3-
氰基-3-4-[(4-[(2Z)-2-(甲氧基
亚胺)-2-苯乙基]氧基}苯基)氧基]苯基}
丙酸或其盐的过程。在一种形式中,该发明涉及制备(-)-3-
氰基-3-4-[(4-[(2Z)-2-(甲氧基
亚胺)-2-苯乙基]氧基}苯基)氧基]苯基}
丙酸的过程,并将(-)-对映体转化为钠盐,即
钠3-
氰基-3-4-[(4-[(2Z)-2-(甲氧基
亚胺)-2-苯乙基]氧基}苯基)氧基]苯基}
丙酸盐。