Tuning the Biological Activity of RGD Peptides with Halotryptophans
作者:Isabell Kemker、David C. Schröder、Rebecca C. Feiner、Kristian M. Müller、Antoine Marion、Norbert Sewald
DOI:10.1021/acs.jmedchem.0c01536
日期:2021.1.14
halogenation by halogenases or incorporation of haloindoles using tryptophan synthase. Introduction of these Trp derivatives into RGD peptides as a benchmark system was performed to investigate their influence on bioactivity. Halotryptophan-containing RGD peptides display increased affinity toward integrin αvβ3 and enhanced selectivity over integrin α5β1. In addition, bromotryptophan was exploited as a platform
使用通过卤化酶的酶促卤化或使用色氨酸合酶掺入卤代吲哚来合成在吲哚部分具有不同取代基的1-和d-卤代色氨酸的阵列。将这些Trp衍生物引入RGD肽作为基准系统以研究其对生物活性的影响。含Halotryptophan-RGD肽显示增加的亲和力朝向整合素α v β 3和增强的过整合素α选择性5 β 1。另外,铃木色氨酸被铃木-宫浦交叉耦合(SMC)开发为后期多样化的平台,从而产生了新的自然的联芳基序。这些肽显示出增强的朝向α亲和力v β 3,良好的亲和力,以α v β 8,和显着的选择性超过α 5 β 1和α IIB β 3,同时具有荧光性质。在体外证明了其作为探针的可行性。进行了广泛的分子动力学模拟,以阐明这些后期多样化的环状RGD肽的NMR和高效液相色谱(HPLC)数据,并进一步表征其构象偏好。
Process for preparation of benzo[f]quinolinones
申请人:Eli Lilly and Company
公开号:US05578724A1
公开(公告)日:1996-11-26
A series of benzoquinolin-3-ones are pharmaceuticals effective in treating conditions consequent on both Type I and Type II 5.alpha.-reductase and their preparation is disclosed.
HandaPhos: A General Ligand Enabling Sustainable ppm Levels of Palladium-Catalyzed Cross-Couplings in Water at Room Temperature
作者:Sachin Handa、Martin P. Andersson、Fabrice Gallou、John Reilly、Bruce H. Lipshutz
DOI:10.1002/anie.201510570
日期:2016.4.11
complexed in a 1:1 ratio with Pd(OAc)2, enables Pd‐catalyzed cross‐couplings to be run using ≤1000 ppm of this pre‐catalyst. Applications to Suzuki–Miyaura reactions involving highly funtionalized reaction partners are demonstrated, all run using environmentally benign nanoreactors in water at ambient temperatures. Comparisons with existing state‐of‐the‐art ligands and catalysts are discussed herein.
Efficient Syntheses of Korupensamines A, B and Michellamine B by Asymmetric Suzuki-Miyaura Coupling Reactions
作者:Guangqing Xu、Wenzhen Fu、Guodu Liu、Chris H. Senanayake、Wenjun Tang
DOI:10.1021/ja409669r
日期:2014.1.15
Efficient asymmetricSuzuki-Miyauracouplingreactions are employed for the first time in total syntheses of chiral biaryl natural products korupensamine A and B in combination with an effective diastereoselective hydrogenation, allowing ultimately a concise and stereoselective synthesis of michellamine B. Chiral monophosphorus ligands L1-3 are effective for the syntheses of a series of functionalized
高效的不对称 Suzuki-Miyaura 偶联反应首次用于手性联芳基天然产物 korupensamine A 和 B 的全合成,并结合有效的非对映选择性氢化,最终实现了米歇尔胺 B 的简洁立体选择性合成。 手性单磷配体 L1-3通过不对称 Suzuki-Miyaura 偶联反应以优异的产率和对映选择性(高达 99% ee)合成一系列官能化手性联芳基化合物是有效的。高度极化的 BOP 基团与芳基硼酸偶联物的扩展 π 系统之间存在极性-π 相互作用被认为对于高对映选择性很重要。