Synthesis, Structure, and Neuroprotective Properties of Novel Imidazolyl Nitrones
摘要:
A new series of imidazolyl nitrones spin traps has been synthesized and evaluated pharmacologically. The salient structural feature of these molecules is the presence of an imidazole moiety substituted by aromatic or heteroaromatic cycles. This connectivity imparts to the nitrone superior neuroprotective properties in vivo and in parallel reduced side effects and toxicity. Thus compound 6a (a 2-phenylimidazolyl nitrone) administered intraperitoneally protects (80%) mice from lethality induced by an intracerebroventricular administration of tert-butyl hydroperoxide (t-BHP) an oxidant capable of inducing neurodegenerative processes. Administration of the archetypal nitrone phenyl-tert-butyl nitrone (PBN) at an equimolar dose also affords some protection (60%) in this test. However, this activity is accompanied by hypothermia, whereas no such effect is apparent for 6a. Moreover, previously prepared nonsubstituted or alkyl-substituted imidazolyl nitrones were shown to be extremely toxic to rats in contrast to the compounds prepared in this study. The observed activities in vivo correlate well with the calculated partition coefficients (ClogP) and HOMO energy level.
Synthesis, Structure, and Neuroprotective Properties of Novel Imidazolyl Nitrones
摘要:
A new series of imidazolyl nitrones spin traps has been synthesized and evaluated pharmacologically. The salient structural feature of these molecules is the presence of an imidazole moiety substituted by aromatic or heteroaromatic cycles. This connectivity imparts to the nitrone superior neuroprotective properties in vivo and in parallel reduced side effects and toxicity. Thus compound 6a (a 2-phenylimidazolyl nitrone) administered intraperitoneally protects (80%) mice from lethality induced by an intracerebroventricular administration of tert-butyl hydroperoxide (t-BHP) an oxidant capable of inducing neurodegenerative processes. Administration of the archetypal nitrone phenyl-tert-butyl nitrone (PBN) at an equimolar dose also affords some protection (60%) in this test. However, this activity is accompanied by hypothermia, whereas no such effect is apparent for 6a. Moreover, previously prepared nonsubstituted or alkyl-substituted imidazolyl nitrones were shown to be extremely toxic to rats in contrast to the compounds prepared in this study. The observed activities in vivo correlate well with the calculated partition coefficients (ClogP) and HOMO energy level.
Process for preparing 6-alkylidene penem derivatives
申请人:Wyeth
公开号:US20040132708A1
公开(公告)日:2004-07-08
The present invention provides a process of making compounds of formula I, which are useful for the treatment of bacterial infection or disease.
1
本发明提供了一种制备式I化合物的方法,该化合物对治疗细菌感染或疾病有用。
[EN] PROCESS FOR PREPARING 6-ALKYLIDENE PENEM DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES DE 6-ALKYLIDENE PENEM
申请人:WYETH CORP
公开号:WO2003093277A1
公开(公告)日:2003-11-13
The present invention provides a process of making compounds of Formula (I), which are useful for the treatment of bacterial infection or disease.
本发明提供了一种制备化合物的方法,该化合物符合式(I),对于治疗细菌感染或疾病非常有用。
Novel imidazole substituted 6-methylidene-penems as broad-spectrum β-lactamase inhibitors
作者:Aranapakam M. Venkatesan、Atul Agarwal、Takao Abe、Hideki Ushirogochi、Itsuki Yamamura、Toshio Kumagai、Peter J. Petersen、William J. Weiss、Eileen Lenoy、Youjun Yang、David M. Shlaes、John L. Ryan、Tarek S. Mansour
DOI:10.1016/j.bmc.2004.08.039
日期:2004.11
several beta-lactamase inhibitors such as clavulanic acid, sulbactam, and tazobactam are widely used in the clinic in combination with beta-lactam antibiotics. However, single point mutations within these enzymes have allowed bacteria to overcome the inhibitory effect of the commercially approved beta-lactamase inhibitors. Although the commercially available beta-lactamase inhibitor/beta-lactam antibiotic
A new series of imidazolyl nitrones spin traps has been synthesized and evaluated pharmacologically. The salient structural feature of these molecules is the presence of an imidazole moiety substituted by aromatic or heteroaromatic cycles. This connectivity imparts to the nitrone superior neuroprotective properties in vivo and in parallel reduced side effects and toxicity. Thus compound 6a (a 2-phenylimidazolyl nitrone) administered intraperitoneally protects (80%) mice from lethality induced by an intracerebroventricular administration of tert-butyl hydroperoxide (t-BHP) an oxidant capable of inducing neurodegenerative processes. Administration of the archetypal nitrone phenyl-tert-butyl nitrone (PBN) at an equimolar dose also affords some protection (60%) in this test. However, this activity is accompanied by hypothermia, whereas no such effect is apparent for 6a. Moreover, previously prepared nonsubstituted or alkyl-substituted imidazolyl nitrones were shown to be extremely toxic to rats in contrast to the compounds prepared in this study. The observed activities in vivo correlate well with the calculated partition coefficients (ClogP) and HOMO energy level.