A fast, solvent-free solid acid mediated synthetic strategy for the synthesis of bisindolylmethanes has been developed. The process is applicable to a wide range of substrates with different protecting group survival properties. Reusability of Fe/Al pillared clay for more than 5 cycles without significant loss of catalytic activity adds to the features of the reaction.
<i>N</i>-Heteroaryl Carbamates from Carbon Dioxide <i>via</i> Chemoselective Superbase Catalysis: Substrate Scope and Mechanistic Investigation
作者:Jere K. Mannisto、Ljiljana Pavlovic、Johannes Heikkinen、Tony Tiainen、Aleksi Sahari、Norbert M. Maier、Kari Rissanen、Martin Nieger、Kathrin H. Hopmann、Timo Repo
DOI:10.1021/acscatal.3c02362
日期:2023.9.1
exposed to CO2, carbamate salts are formed. These can be categorized into two subgroups, stable and fluxional carbamate salts, where the latter undergo fast and reversible CO2 exchange, thus being poor substrates for alkylation. Experiments and DFT calculations indicate that the fluxional behavior is primarily caused by substrate-specific electronic destabilization effects. The degree of destabilization depends
我们报道了N-杂芳基的温和超碱催化和氮选择性羧化,随后的烷基化能够以良好的产率合成类似药物的O-烷基氨基甲酸酯(平均 86%)。我们的研究结果表明对当前机理的理解进行了部分修改,因为超强碱与吲哚和唑混合后通常会形成不带电的氢键络合物,而不是像之前提出的那样形成离子盐。然而,当这些络合物暴露于CO 2时,形成氨基甲酸盐。这些可以分为两个亚组:稳定的氨基甲酸盐和流动的氨基甲酸盐,其中后者经历快速且可逆的 CO 2交换,因此是烷基化的不良底物。实验和 DFT 计算表明,通量行为主要是由基板特定的电子不稳定效应引起的。不稳定程度取决于杂环结构中氮原子的数量和官能团取代。可以通过使用较低的温度和/或较高的CO 2压力来补偿流动性,因为这两种措施都能充分稳定氨基甲酸盐,从而能够进行后续的烷基化。
Peptide and peptide mimetic binding antagonists of polo-like kinase 1 polo box domain and methods of use
申请人:The United States of America, as represented by the Secretary, Department of Health & Human Services
公开号:US10905769B2
公开(公告)日:2021-02-02
The description provides novel compounds that may serve as anticancer therapeutics. The compounds of the description bind to polo-like kinases through the polo-box domain. The peptide derivatives of the description have achieved improved efficacy in biochemical assays against Plk1. Exemplary compounds of the description include macrocyclic peptidomimetics with high affinity and selectivity for polo-like kinases, which may provide the basis for a new genre of anticancer therapeutics. Other exemplary compounds of the description include bi-valent compounds with that bind to polo-like kinases through both kinase domain and polo-box domain simultaneously by incorporating additional moieties that target Plk1 kinase domain, which significantly enhances affinitity relative and may provide the basis for a new genre of anticancer therapeutics. The description also provides methods of use, methods of preparation, compositions, and kits thereof. Further, the description provides a novel method of design and/or synthesis of phosphoryl-derived peptide derivatives useful as therapeutic agents.
Design, Synthesis, and Pharmacological Characterization of Indol-3-ylacetamides, Indol-3-yloxoacetamides, and Indol-3-ylcarboxamides: Potent and Selective CB2 Cannabinoid Receptor Inverse Agonists
作者:Serena Pasquini、Claudia Mugnaini、Alessia Ligresti、Andrea Tafi、Simone Brogi、Chiara Falciani、Valentina Pedani、Nicolò Pesco、Francesca Guida、Livio Luongo、Katia Varani、Pier Andrea Borea、Sabatino Maione、Vincenzo Di Marzo、Federico Corelli
DOI:10.1021/jm3003334
日期:2012.6.14
In our search for new cannabinoid receptor modulators, we describe herein the design and synthesis of three sets of indole-based ligands characterized by an acetamide, oxalylamide, or carboxamide chain, respectively. Most of the compounds showed affinity for CB2 receptors in the nanomolar range, with K-i values spanning 3 orders of magnitude (377-0.37 nM), and moderate to good selectivity over CB1 receptors. Their in vitro functional activity as inverse agonists was confirmed in vivo in the formalin test of acute peripheral and inflammatory pain in mice, in which compounds 10a and 11e proved to be able to reverse the effect of the CB2 selective agonist COR167.
[EN] PEPTIDE AND PEPTIDE MIMETIC BINDING ANTAGONISTS OF POLO-LIKE KINASE 1 POLO BOX DOMAIN AND METHODS OF USE<br/>[FR] PEPTIDES ET PEPTIDES MIMÉTIQUES ANTAGONISTES DE LIAISON DE DOMAINE POLO-BOX DE KINASE 1 DE TYPE POLO ET PROCÉDÉ D'UTILISATION
申请人:THE US SECRETARY DEPT OF HEALTH & HUMAN SERVICES
公开号:WO2017082924A1
公开(公告)日:2017-05-18
The description provides novel compounds that may serve as anticancer therapeutics. The compounds of the description bind to polo-like kinases through the polo-box domain. The peptide derivatives of the description have achieved improved efficacy in biochemical assays against Plk1. The description also provides methods of use, methods of preparation, compositions, and kits thereof. Further, the description provides a novel method of design and/or synthesis of phosphoryl-derived peptide derivatives useful as therapeutic agents.