申请人:Hoffmann-La Roche Inc.
公开号:US04948898A1
公开(公告)日:1990-08-14
The manufacture of 1-sulpho-2-oxazetidine derivatives of the formula ##STR1## in which Het is an optionally amino-substituted, 5- or 6-membered, aromatic heterocycle containing 1 or 2 nitrogen atoms and optionally also an oxygen or sulphur atom, R.sup.1 is hydrogen, lower alkyl, phenyl-lower alkyl, lower alkanoyl, lower alkoxycarbonyl, lower alkenyl-lower alkyl, lower alkoxycarbonyl-lower alkyl, phenyl-lower-alkoxycarbonyl-lower alkyl, nitrophenyl-lower-alkoxycarbonyl-lower alkyl or carboxy-lower alkyl and R.sup.2 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, lower alkoxycarbonyl, lower alkanoyloxy-lower alkyl, lower alkoxycarbonyl-lower alkenyl, hydroxyiminomethyl, lower alkoxyiminomethyl, carbamoyl, carbamoyl-lower alkenyl or carbamoyloxy-lower alkyl, the group .dbd.NOR.sup.1 being present at least partially in the syn-form, in racemic form or in the form of the 3S-enantiomer, and of readily hydrolyzable esters and pharmaceutically compatible salts of these compounds, by acylating a compound of the formula ##STR2## in which R.sup.20 equals R.sup.2 or can also represent a 2,2-dimethyl-1,3-dioxolan-4-yl group and R.sup.3 is hydrogen or sulpho, or a salt thereof with a thioester of the formula ##STR3## in which Het is as above and R.sup.10 has any of the values of R.sup.1 except carboxy-lower alkyl, and can also represent a tri-lower alkyl-silyl-lower-alkoxycarbonyl-lower alkyl group or a carboxy-lower alkyl group converted into a readily hydrolyzable ester group, and the group .dbd.NOR.sup.10 is present at least partially in the syn-form, and carrying out subsequent steps (N-sulphonation, conversion of R.sup.20 into R.sup.2, R.sup.10 into R.sup.1), some of which are optional. The invention also provides certain novel products of formula I and benzthiazolyl thioesters of formula III per se and the preparation of the benzthiazolyl thioesters by esterifying corresponding carboxylic acids. Finally, the invention provides a process for the preparation of carboxylic acids in which R.sup.1 is t-alkoxycarbonylmethyl. The compounds of formula I have antimicrobial activity.
制备公式为##STR1##的1-磺酸基-2-噁唑烷衍生物,其中Het是一个含有1或2个氮原子和可选的氧原子或硫原子的5或6元芳环,可选地氨基取代,R.sup.1是氢,低烷基,苯基-低烷基,低酰基,低烷氧羰基,低烯基-低烷基,低烷氧羰基-低烷基,苯基-低-烷氧羰基-低烷基,硝基苯基-低-烷氧羰基-低烷基或羧基-低烷基,R.sup.2是氢,低烷基,低烯基,低炔基,低烷氧羰基,低酰氧基-低烷基,低烷氧羰基-低烯基,羟亚胺甲基,低烷氧亚胺甲基,氨基甲酰基,氨基甲酰基-低烯基或氨基甲氧羰基-低烷基,.dbd.NOR.sup.1基团至少部分以syn-形式存在,以外消旋体形式或3S对映体形式存在,以及这些化合物的易水解酯和药学兼容盐的制备方法,通过用公式##STR2##的化合物与公式##STR3##的硫代酯进行酰化,其中Het如上所述,R.sup.10具有除羧基-低烷基以外的任何R.sup.1值,也可以表示为三低烷基硅烷基-低烷氧羰基-低烷基或转化为易水解酯基的羧基-低烷基,.dbd.NOR.sup.10基团至少部分以syn-形式存在,以及进行后续步骤(N-磺酸化,将R.sup.20转化为R.sup.2,将R.sup.10转化为R.sup.1),其中一些步骤是可选的。该发明还提供了公式I和公式III的苯并噻唑硫代酯的某些新产品以及通过酯化相应的羧酸制备苯并噻唑硫代酯的方法。最后,该发明提供了一种制备R.sup.1为t-烷氧羰基甲基的羧酸的方法。公式I化合物具有抗微生物活性。