[EN] NOVEL INTERMEDIATES FOR SYNTHESIS OF CEPHALOSPORINS AND PROCESS FOR PREPARATION OF SUCH INTERMEDIATES<br/>[FR] NOUVEAUX INTERMEDIAIRES POUR LA SYNTHESE DE CEPHALOSPORINES ET LEUR PROCEDE DE PREPARATION
申请人:LUPIN LTD
公开号:WO2004058695A1
公开(公告)日:2004-07-15
A novel 4-halo-2-oxyimino-3-oxo butyric acid-N, N-dimethyl formiminium chloride chlorosulfate of formula (I) useful in the preparation of cephalosporin antibiotics, wherein X is chlorine or bromine; R is hydrogen, C1-4 alkyl group, an easily removable hydroxyl protective group, -CH2COOR5, or -C(CH3)2COOR5, wherein R5 is hydrogen or an easily hydrolysable ester group. The compound of formula (I) is prepared by reacting 4-halo-2-oxyimino-3-oxobutyric acid of formula (IV1), wherein X, R and R5 are as defined above, with N, N-dimethylformiminium chloride chlorosulphate of formula (VII), in an organic solvent at a temperature ranging from -30 °C to -15 °C. The cephalosporins that may be prepared from the intermediate include cefdinir, cefditoren pivoxil, cefepime, cefetamet pivoxil, cefixime, cefmenoxime, cefodizime, cefoselis, cefotaxime, cefpirome, cefpodoxime proxetil, cefquinome, ceftazidime, cefteram pivoxil, ceftiofur, ceftizoxime, ceftriaxone and cefuzonam.
一种新型的4-卤代-2-氧基亚胺基-3-酮丁酸-N,N-二甲基甲酰氯氯磺酸盐化合物,化学式为(I),用于头孢菌素抗生素的制备,其中X为氯或溴;R为氢、C1-4烷基、易于去除的羟基保护基、-CH2COOR5,或-C(CH3)2COOR5,其中R5为氢或易水解的酯基。化合物的化学式(I)通过将化学式(IV1)中的4-卤代-2-氧基亚胺基-3-酮丁酸(其中X、R和R5如上定义)与化学式(VII)中的N,N-二甲基甲酰氯氯磺酸盐在有机溶剂中在-30°C至-15°C的温度范围内反应制备。从中间体制备的头孢菌素包括头孢地尼尔、头孢地伦匹沃希、头孢吡肟、头孢他美匹沃希、头孢克烯、头孢美诺西、头孢地西美、头孢西利斯、头孢噻肟、头孢哌酮、头孢多酯普罗西替、头孢喹诺酮、头孢他唑啉、头孢替拉匹沃希、头孢替呋咐、头孢替唑酮、头孢三嗪和头孢唑纳。