[EN] PROCESS FOR PRODUCTION OF INTERMEDIATES FOR USE IN CEFALOSPORIN SYNTHESIS<br/>[FR] PROCEDE DE PRODUCTION DE PRODUITS INTERMEDIAIRES UTILISABLES DANS LA SYNTHESE DE CEPHALOSPORINE
申请人:SANDOZ AG
公开号:WO2005063772A1
公开(公告)日:2005-07-14
The invention relates to a new process for the production of intermediates for the synthesis of cephalosporin of formula (I) wherein R1, R2 and R3, independently of one another, are aklyl, alkenyl, aryl, hydroxy(C1-6)alkyl, carbamoyl-(C1-6)alkyl, amino-(C1-6)alkyl, aclamino-(C1-6)alkyl or carboxy(C1-6)alkyl, or wherein R2 and R3 together with the adjacent nitrogen atom, form an alicyclic 5- to 8-membered heterocyclic ring, and R1 signifies alkyl, alkenyl or aryl. The process according to the invention is notable in that the formation of undesired by-products, especially Δ2-analogous compounds of formula (I), is greatly reduced.
该发明涉及一种用于合成头孢菌素中间体的新工艺,其化学结构如下(I),其中R1、R2和R3独立地为烷基、烯基、芳基、羟基(C1-6)烷基、氨基甲酰(C1-6)烷基、氨基(C1-6)烷基、氨甲酰氨基(C1-6)烷基或羧基(C1-6)烷基,或者R2和R3与相邻的氮原子一起形成脂环5至8元杂环环,而R1代表烷基、烯基或芳基。该发明的工艺之所以显著,是因为不良副产物的形成,特别是化学结构如下(I)的Δ2类似化合物的生成大大减少。