申请人:Prabhat Sahoo Kumar
公开号:US20060173175A1
公开(公告)日:2006-08-03
The present invention relates to an improved process for the preparation of Cefditoren of formula (I), the said process comprising the steps of: i) converting the compound of formula (II) to a compound of the formula (III) using TPP and sodium iodide in the presence of THF, water, and base; ii) reacting the compound of formula (III) with 4-methyl-5-formyl-thiazole to produce a compound of formula (IV); iii) deesterifying the compound of the formula (IV) to yield compound of formula (V); iv) converting the compound of formula (V) to compound of formula (VI) in the presence of a base and solvent; v) converting the compound of formula (VI) into compound of formula (VII) by enzymatic hydrolysis; and vi) reacting compound of formula (VII) with compound of formula (VIII) in the presence of solvent and base to produce compound of formula (I).
本发明涉及一种改进的制备Cefditoren(式(I))的方法,该方法包括以下步骤:i)使用TPP和碘化钠在THF、水和碱的存在下将式(II)的化合物转化为式(III)的化合物;ii)将式(III)的化合物与4-甲基-5-甲醛噻唑反应,得到式(IV)的化合物;iii)脱酯化式(IV)的化合物,得到式(V)的化合物;iv)在碱和溶剂的存在下将式(V)的化合物转化为式(VI)的化合物;v)通过酶解将式(VI)的化合物转化为式(VII)的化合物;vi)在溶剂和碱的存在下将式(VII)的化合物与式(VIII)的化合物反应,得到式(I)的化合物。