A Physical Organic Approach to Tuning Reagents for Selective and Stable Methionine Bioconjugation
作者:Alec H. Christian、Shang Jia、Wendy Cao、Patricia Zhang、Arismel Tena Meza、Matthew S. Sigman、Christopher J. Chang、F. Dean Toste
DOI:10.1021/jacs.9b04744
日期:2019.8.14
We report a data-driven, physicalorganic approach to the development of new methionine-selective bioconjugation reagents with tunable adduct stabilities. Statistical modeling of structural features described by intrinsic physicalorganic parameters was applied to the development of a predictive model and to gain insight into features driving the stability of adducts formed from the chemoselective
First Synthesis of Highly Chemiluminescent Benzo[<i>b</i>]furan‐2(3<i>H</i>)‐ones Bearing a Urea Substructure
作者:Reimar Krieg、Birgit Hoffmann、Dieter Weiß、Christoph Biskup
DOI:10.1002/hlca.201800243
日期:2019.6
A series of benzo[b]furan‐2(3H)‐ones (coumaran‐2‐ones) bearing a urea substructure, namely derivatives of 3‐(aminocarbonylamino)benzo[b]furan‐2(3H)‐one, was prepared for the first time. The accessibility of these compounds through an electrophilic α‐amidoalkylation approach of phenols (Tscherniac–Einhorn reaction) in the key step as well as the chemiluminescence (CL) properties of the desired compounds
一系列带有脲亚结构的苯并[ b ]呋喃-2(3 H)-ones(coumaran-2-ones),即3-(氨基羰基氨基)苯并[ b ]呋喃-2(3 H)-one的衍生物,是第一次准备。这些化合物在关键步骤中通过酚类的亲电α氨基烷基化方法(Tscherniac-Einhorn反应)的可及性以及所需化合物的化学发光(CL)性能在很大程度上取决于尿素部分的取代方式。讨论了竞争性的反应途径,并提出了一种具有普遍意义的改进的一锅法合成方法。总之,尤其是N,苯并[ b ]呋喃-2(3 H)-的N-二烷基氨基羰基氨基衍生物在用1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)处理后表现出强烈的闪光,如蓝色CL在氧气或过氧化氢的存在下。比较的物理化学研究表明,就CL强度和衰变速度而言,新化合物的性能优于其氨基甲酸酯类似物,这使其有可能在短时间内用作基于CL的新工具。
[EN] INDAZOLOPYRIMIDINONES AS FIBRINOLYSIS INHIBITORS<br/>[FR] INDAZOLOPYRIMIDINONES COMME INHIBITEURS DE LA FIBRINOLYSE
申请人:BAYER PHARMA AG
公开号:WO2016173948A1
公开(公告)日:2016-11-03
The present application relates to novel substituted indazolopyrimidinones, to processes for their preparation, the compounds for use alone or in combinations in a method for the treatment and/or prophylaxis of diseases, in particular for the treatment and/or prophylaxis of acute and recurrent bleeding in patients with or without underlying hereditary or acquired hemostatic disorders, wherein the bleeding is associated with a disease or medical intervention selected from the group consisting of heavy menstrual bleeding, postpartum hemorrhage, hemorrhagic shock, trauma, surgery, transplantation, stroke, liver diseases, hereditary angioedema, nosebleed, and synovitis and cartilage damage following hemarthrosis.
Regioselective Formal [3+2] Cycloadditions of Urea Substrates with Activated and Unactivated Olefins for Intermolecular Olefin Aminooxygenation
作者:Fan Wu、Nur‐E Alom、Jeewani P. Ariyarathna、Johannes Naß、Wei Li
DOI:10.1002/anie.201904662
日期:2019.8.19
A new class of intermolecular olefin aminooxygenation reaction is described. This reaction utilizes the classic halonium intermediate as a regio‐ and stereochemical template to accomplish the selective oxyamination of both activated and unactivated alkenes. Notably, urea chemical feedstock can be directly introduced as the N and O source and a simple iodide salt can be utilized as the catalyst. This
S N H Alkyl carbamoyl amination of 3-nitropyridine: competitive synthesis of nitro- and nitrosopyridine derivatives
作者:Elena K. Avakyan、Ivan V. Borovlev、Oleg P. Demidov、Gulminat A. Amangasieva、Diana Yu. Pobedinskaya
DOI:10.1007/s10593-018-2201-6
日期:2017.11
has been developed for oxidativeSNH alkyl carbamoyl amination of 3-nitropyridine in anhydrous DMSO. When anions of alkyl- and 1,1-dialkylureas were used as nucleophiles, an unusual formation of a mixture consisting of 1-alkyl(1,1-dialkyl)-3-(5-nitropyridin-2-yl)ureas and their nitroso analogs occurred, which was the first such observation with 3-nitropyridine. Only the nitro products formed in the