Synthesis and structure-activity relationships of antibacterial phosphonopeptides incorporating (1-aminoethyl)phosphonic acid and (aminomethyl)phosphonic acid
摘要:
Phosphonodipeptides and phosphonooligopeptides based on L- and D-(1-aminoethyl)phosphonic acids L-Ala(P) and D-Ala(P) and (aminomethyl)phosphonic acid Gly(P) at the acid terminus have been synthesized and investigated as antibacterial agents, which owe their activity to the inhibition of bacterial cell-wall biosynthesis. A method for large-scale synthesis of the potent antibacterial agent L-Ala-L-Ala(P) (1, Alafosfalin) is described. Structure-activity relationships in the dipeptide series have been studied by systematic variation of structure 1. L stereochemistry is generally required for both components. Changes in the L-Ala(P) moiety mostly lead to loss of antibacterial activity, but the phosphonate analogues of L-phenylalanine, L-Phe(P), and L-serine, L-Ser(P), give rise to weakly active L-Ala-L-Phe(P) and L-Ala-L-Ser(P). Replacement of L-Ala in 1 by common and rare amino acids can give rise to more potent in vitro antibacterials such as L-Nva-L-Ala(P) (45). Synthetic variation of these more potent dipeptides leads to decreased activity. Phosphonooligopeptides such as (L-Ala)2-L-Ala(P) have a broader in vitro antibacterial spectrum than their phosphonodipeptide precursor, but this is not expressed in vivo, presumably due to rapid metabolism to 1. Stabilized compounds such as Sar-L-Nva-L-Nva-L-Ala(P) (46) have been developed that are more potent in vivo and have a broader in vivo antibacterial spectrum than the parent phosphonodipeptide.
Synthesis and Structure−Activity Relationships of 2-Pyridones: A Novel Series of Potent DNA Gyrase Inhibitors as Antibacterial Agents
作者:Qun Li、Daniel T. W. Chu、Akiyo Claiborne、Curt S. Cooper、Cheuk M. Lee、Kathleen Raye、Kristine B. Berst、Pamela Donner、Weibo Wang、Lisa Hasvold、Anthony Fung、Zhenkun Ma、Michael Tufano、Robert Flamm、Linus L. Shen、John Baranowski、Angela Nilius、Jeff Alder、Jonathan Meulbroek、Kennan Marsh、DeAnne Crowell、Yuhua Hui、Louis Seif、Laura M. Melcher、Rodger Henry、Steven Spanton、Ramin Faghih、Larry L. Klein、S. Ken Tanaka、Jacob J. Plattner
DOI:10.1021/jm960207w
日期:1996.1.1
Two novel series of 2-pyridones were synthesized by transposition of the nitrogen of 4-quinolones to the bridgehead position. This subtle interchange of the nitrogenatom with a carbon atom yielded two novel heterocyclic nuclei, pyrido[1,2-alpha]pyrimidine and quinolizine, which had not previously been evaluated as antibacterial agents and were found to be potent inhibitors of DNA gyrase. Quinolizines
Structure-Activity Study of 5-Substituted 1-Carbobenzoxy-2-iminohydantoins as Potential Anticonvulsant Agents
作者:Zhong-Yue Sun、Chul-Hoon Kwon、John N. D. Wurpel
DOI:10.1021/jm00044a003
日期:1994.9
compounds except 8 also showed activity against the scMET test with ED50 values in the range of 141-223 mg/kg. All significantly active compounds (1, 6, 7a, 8, 9, and 11) possessed aliphatic hydrocarbon side chains of two- to three-carbon lengths at the C5 position. All of the compounds with no or minimal activity had either shorter or longer side chains. The compounds substituted at the C5 position by
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.
Structure–CaSR–Activity Relation of <i>Kokumi</i> γ-Glutamyl Peptides
作者:Yusuke Amino、Masakazu Nakazawa、Megumi Kaneko、Takashi Miyaki、Naohiro Miyamura、Yutaka Maruyama、Yuzuru Eto
DOI:10.1248/cpb.c16-00293
日期:——
activities have been shown to be positively correlated, suggesting that kokumi gamma-glutamyl peptides are perceived through CaSRs in humans. Our research is based on the hypothesis that the discovery of highly active CaSR agonist peptides will lead to the creation of practical kokumi peptides. Through continuous study of the structure-CaSR-activity relation of a large number of gamma-glutamyl peptides, we have
Aminosäurederivate, Verfahren zu deren Herstellung, Zwischenprodukte bei deren Herstellung und diese enthaltende pharmazeutische Präparate
申请人:F. HOFFMANN-LA ROCHE & CO.
Aktiengesellschaft
公开号:EP0002534A1
公开(公告)日:1979-06-27
Neue Verbindungen der allgemeinen Formel I
worin R' Wasserstoff, Methyl, Hydroxymethyl, Mono-, Di oder Trihalogenmethyl bedeutet und R2 nieder-Alkyl, Hydroxy-niederalkyl oder Guanidino-niederalkyl darstellt, mit Ausnahme der normalerweise in Proteinen gefundenen Gruppen dieses Typs; mit R-Konfiguration am mit (a) gekennzeichneten C-Atom (falls R' nicht Wasserstoff darstellt) und L-Konfiguration am mit (b) gekennzeichneten C-Atom
sowie pharmazeutisch verträgliche Salze davon. Diese Verbindungen wirken antibakteriell und potenzieren die Wirkung von Antibiotika. Sie lassen sich nach an sich bekannten Verfahren herstellen.
通式 I 的新型化合物,其中 R'为氢、甲基、羟甲基、一卤代、二卤代或三卤代甲基,R2 为低级烷基、羟基-低级烷基或胍基-低级烷基,但通常存在于蛋白质中的此类基团除外;C 原子上的 R 构型标记为 (a)(如果 R'不是氢),C 原子上的 L 构型标记为 (b),及其药学上可接受的盐类。 这些化合物具有抗菌活性,并能增强抗生素的效果,可通过本身已知的方法制备。