为了开发具有增强的自由基清除剂性能的更有效的小分子,我们设计并合成了一系列硝酰基硝基氧衍生物4a-h。基于Ach诱导的血管舒张测定法发现了前导化合物4f。基于该支架的进一步化学修饰提供了一系列新的2-取代的苯基亚硝酰基硝基氧化物衍生物6a-s。基于PC12细胞存活测定法,新合成的化合物6a-s具有改善的自由基清除剂的活性。就NO,H(2)O(2)和OH的清除能力而言,化合物6g,n,o和s是一些最有效的化合物。2-取代的苯基亚硝基硝基氮氧化物具有较高的自由基清除活性,带有给电子基团(EDG)。相比之下,吸电子基团(EWG)引入芳环导致其自由基清除活性急剧下降。这些结果表明,芳香环的给电子基团(EDG)可能是影响这些化合物清除自由基行为的重要因素,清除自由基的能力很大程度上取决于苯环的位置和电子性质。取代基。新型的2-取代的硝酰基氮氧化物的增强的自由基清除能力可能是对抗ROS(活性氧)/ R
A class of novel nitronyl nitroxide labeling basic and acidic amino acids: Synthesis, application for preparing ESR optionally labeling peptides, and bioactivity investigations
作者:Jianwei Zhang、Ming Zhao、Guohui Cui、Shiqi Peng
DOI:10.1016/j.bmc.2008.01.022
日期:2008.4.1
beta-carboxyl of L-Asp-OH and the gamma-carboxyl of L-Glu-OH with ethylamino as a linker. It was explored that the synthetic 30 novel ESR labeling amino acid derivatives were stable enough to the reaction conditions of peptide synthesis. Their incorporation led to 12 novel ESR optionally labeling PAK, RGDS, RGDV, and ECG. A series of NO related chemical tests, the in vitro and in vivo assays of these
NOVEL COMPOUND WITH EFFECTS OF THROMBOLYSIS, FREE RADICAL SCAVENGING AND THROMBUS-TARGETING AS WELL AS PREPARATION METHOD AND USE THEREOF
申请人:Shanghai Lumosa Therapeutics, Co., Ltd.
公开号:US20150290339A1
公开(公告)日:2015-10-15
The present invention discloses a novel compound with effects of thrombolysis, free radical scavenging and thrombus-targeting, as well as a preparation method and use thereof. The compound is a ternary conjugate formed by conjugating a thrombolytic peptide, a free radical scavenger and a thrombus-targeting/antithrombotic peptide together via a linking arm. The present invention also discloses a pharmaceutical composition containing the compounds, wherein the compounds form a nanospherical structure.
synthetic procedure for opticallyactive and racemic α-nitronyl nitroxides (α-NNs) having a stereogenic center at the 4-position of the imidazolyl ring is described. This procedure consists of (1) the synthesis of a dissymmetric vic-dinitro compound by Kornblum reaction, (2) the enantiomeric resolution of the racemate by a diastereomer method for obtaining the opticallyactive sample, (3) the quick reduction
Novel Nitronyl Nitroxides: Synthesis and Properties
作者:Stefan Greve、Volkmar Vill、Willy Friedrichsen
DOI:10.1515/znb-2002-0614
日期:2002.6.1
Abstract
The synthesis of several new nitronyl nitroxides with mesogenic groups is reported (6a, b, 11, 14a, b). Microscopic investigations revealed that in some cases (6b, 14b) highly ordered mesogenic phases are formed.
Compound with effects of thrombolysis, free radical scavenging and thrombus-targeting
申请人:Shanghai Lumosa Therapeutics Co., Ltd.
公开号:US10806798B2
公开(公告)日:2020-10-20
The present invention discloses a novel compound with effects of thrombolysis, free radical scavenging and thrombus-targeting, as well as a preparation method and use thereof. The compound is a ternary conjugate formed by conjugating a thrombolytic peptide, a free radical scavenger and a thrombus-targeting/antithrombotic peptide together via a linking arm. The present invention also discloses a pharmaceutical composition containing the compounds, wherein the compounds form a nanospherical structure.