[EN] PROCESS FOR THE PREPARATION OF CEPHALOSPORIN ANTIBIOTICS<br/>[FR] PROCEDE DE PREPARATION D'ANTIBIOTIQUES CEPHALOSPORINES
申请人:ORCHID CHEMICALS & PHARM LTD
公开号:WO2004037833A1
公开(公告)日:2004-05-06
The present invention more particularly relates to a process for the preparation of cephalosporin antibiotics of the formula (I) wherein R1 represents hydrogen, trityl, CH3, CRaRbCOORYc where Ra and Rb independently represent hydrogen or methyl and Rc represents hydrogen or (C1-C6)alkyl; R2 is carboxylate ion or COORd, where Rd represents hydrogen, ester or a counter ion which forms a salt; R3 represents hydrogen, CH3, CH2OCOCH3, CH=CH2.
本发明更具体地涉及一种制备头孢菌素抗生素的方法,其中该抗生素的化学式为(I),其中R1代表氢、三苯甲基、CH3、CRaRbCOORYc,其中Ra和Rb独立地代表氢或甲基,Rc代表氢或(C1-C6)烷基;R2为羧酸根离子或COORd,其中Rd代表氢、酯或形成盐的对离子;R3代表氢、CH3、CH2OCOCH3、CH=CH2。