申请人:Ciba-Geigy Corporation
公开号:US04587048A1
公开(公告)日:1986-05-06
The present invention relates to a novel process for the manufacture of 4-thioazetidinone compounds of the formula ##STR1## in which R.sub.1.sup.a represents an amino-protecting group and R.sub.1.sup.b represents hydrogen or an acyl radical Ac, or in which R.sub.1.sup.a and R.sub.1.sup.b together represent a bivalent acyl radical, R.sub.2.sup.A represents an etherified hydroxy group, R.sub.3 represents methyl, hydroxy, etherified or esterified hydroxy, cyano, tertiary amino or nitro, X represents hydrogen or halogen, and Y represents a group --SR.sub.4 or --SO.sub.2 --R.sub.5 in which R.sub.4 represents an optionally substituted heteroaryl radical or the acyl radical of an organic carboxylic or thiocarboxylic acid and R.sub.5 represents an optionally substituted hydrocarbon radical, or, when R.sub.3 represents hydroxy or methyl, tautomers thereof. Compounds of the formula I are manufactured by reacting compounds of the formula III with a nitrosating agent and a compound of the formula IV. Antibiotically active 3-cephem acid derivatives can be manufactured from the compounds of the formula I. The invention relates also to the novel intermediates of the formula III.
本发明涉及一种新型工艺,用于制造式为##STR1##的4-硫代氮杂环丙酮类化合物,其中R.sub.1.sup.a代表氨基保护基,R.sub.1.sup.b代表氢或酰基Ac,或者R.sub.1.sup.a和R.sub.1.sup.b一起代表二价酰基,R.sub.2.sup.A代表醚化的羟基,R.sub.3代表甲基,羟基,醚化或酯化羟基,氰基,三级胺或硝基,X代表氢或卤素,Y代表--SR.sub.4或--SO.sub.2--R.sub.5基团,其中R.sub.4代表一个可选的取代杂环芳基基团或有机羧酸或硫代羧酸酰基,R.sub.5代表一个可选的取代碳氢基团,或者当R.sub.3代表羟基或甲基时,它们的互变异构体。式I的化合物通过将式III的化合物与亚硝酸化剂和式IV的化合物反应制备而成。可以从式I的化合物制造抗生素活性的3-头孢烯酸衍生物。本发明还涉及式III的新型中间体。