申请人:Hoffmann-La Roche Inc.
                            
                            
                                公开号:US04652651A1
                            
                            
                                公开(公告)日:1987-03-24
                            
                            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.
                            该发明涉及一种制备1-
磺酸基-2-
噁唑啉衍
生物的方法,其
化学式为##STR1##其中Het是一种可选
氨基取代的5或6元芳杂环,含有1或2个氮原子,还可含有氧或
硫原子,R.sup.1是氢、低烷基、苯基-低烷基、低烷酰基、低烷氧羰基、低烯基-低烷基、低烷氧羰基-低烷基、苯基-低-氧羰基-低烷基、
硝基苯基-低-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、低烷酰氧-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-低烯基或
氨基甲酰氧-低烷基,其中.dbd.NOR.sup.1的基团至少部分以同构形式、外消旋形式或3S对映体形式存在,这些化合物的容易
水解酯和药物兼容盐的制备方法,通过使化合物##STR2##其中R.sup.20等于R.sup.2或也可以表示为2,2-二甲基-1,3-二氧杂环-4-基基团,R.sup.3是氢或
磺酸基,或其盐,与式##STR3##其中Het如上所述,R.sup.10具有R.sup.1的任何值,除了羧基-低烷基,还可以表示为三低烷基
硅基-低烷氧羰基-低烷基基团或转化为容易
水解酯基团的羧基-低烷基基团,并且.dbd.NOR.sup.10基团至少部分以同构形式存在,并进行随后的步骤(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
化学式I和
化学式III的若干新产品,以及通过酯化相应的
羧酸制备
化学式III的
苯并噻唑基
硫酯的方法。最后,该发明提供了一种制备羧基-叔-烷氧羰基甲基的
羧酸的方法。化合物I具有抗微
生物活性。