申请人:Hoffmann-La Roche Inc.
公开号:US04250085A1
公开(公告)日:1981-02-10
Peptide derivatives provided by the present invention are compounds of the general formula ##STR1## wherein R.sup.1 represents a hydrogen atom or the methyl or hydroxymethyl group or a mono-, di- or trihalomethyl mgroup; R.sup.2 represents the characterizing group of an .alpha.-amino acid of the type normally found in proteins or a lower alkyl or hydroxy- (lower alkyl) group other than the characterising group of an .alpha.-amino acid of the type normally found in proteins; R.sup.3 represents a lower alkyl, lower cycloalkyl, lower alkenyl, aryl or aryl-(lower alkyl) group; R.sup.4 represents a hydrogen atom or a lower alkyl group; n stands for 1,2 or 3; the configuration at the carbon atom designated as (a) is (R) when R.sup.1 represents other than a hydrogen atom and the configuration at the carbon atom designated as (b) is (L) when R.sup.2 represents other than a hydrogen atom, and pharmaceutically acceptable salts thereof. The compounds exhibit activity as antibacterial agents against a range of gram-positive and gram-negative bacteria. Also disclosed are intermediates and a process for the production of the end product.
本发明提供的肽衍生物是具有一般式##STR1##的化合物,其中R.sup.1代表氢原子或甲基或羟甲基基团或单、二或三卤甲基基团;R.sup.2代表通常在蛋白质中发现的α-氨基酸的特征基团或低烷基或除了通常在蛋白质中发现的α-氨基酸的特征基团以外的羟基-(低烷基)基团;R.sup.3代表低烷基、低环烷基、低烯基、芳基或芳基-(低烷基)基团;R.sup.4代表氢原子或低烷基基团;n代表1、2或3;当R.sup.1代表除氢原子以外的其他基团时,指定为(a)的碳原子处的构型为(R),当R.sup.2代表除氢原子以外的其他基团时,指定为(b)的碳原子处的构型为(L),以及其药学上可接受的盐。这些化合物表现出抗一系列革兰氏阳性和革兰氏阴性细菌的活性。还披露了中间体和生产终产品的方法。