Discovery of 3-Amino-4-Chlorophenyl P1 as a novel and potent benzamidine mimic via solid-phase synthesis of an isoxazoline library
摘要:
In an effort to identify orally bioavailable factor Xa inhibitors, two isoxazolines libraries were prepared to scan for novel P1 ligands. From this work, 4-chloro-3-aniline was identified as a novel and potent benzamidine mimic. (C) 2003 Elsevier Science Ltd. All rights reserved.
Thiocyanate radical mediated dehydration of aldoximes with visible light and air
作者:Yong-Liang Ban、Jian-Ling Dai、Xiao-Ling Jin、Qing-Bao Zhang、Qiang Liu
DOI:10.1039/c9cc05354a
日期:——
We developed a new means of activating aldoximes by an in situ generated thiocyanate radical from ammonium thiocyanate and molecular oxygen at room temperature. With a catalytic amount of organic dye aizenuranine as the photocatalyst, the dehydration of aldoximes proceeds smoothly under visiblelight irradiation, providing a simple to handle, excellent functional group tolerance, and metal-free protocol
Selective Mild Oxidation of Anilines into Nitroarenes by Catalytic Activation of Mesoporous Frameworks Linked with Gold‐Loaded Mn
<sub>3</sub>
O
<sub>4</sub>
Nanoparticles
作者:Vassiliki Daikopoulou、Euaggelia Skliri、Eirini D. Koutsouroubi、Gerasimos S. Armatas、Ioannis N. Lykakis
DOI:10.1002/cplu.202100413
日期:2022.1
Mesoporousnanoparticle networks with improved performance were prepared by linking small Au (ca. 3–4 nm in size) and 7–8 nm-sized Mn3O4 nanoparticles using a polymer-templating method. These ensemble Au/Mn3O4 structures, which exhibit high reactivity due to the framework‘s constituents and large internal surface area due to the open-pore structure, demonstrate great potential for selective oxidation
通过使用聚合物模板法连接小 Au(尺寸约 3-4 nm)和 7-8 nm Mn 3 O 4纳米颗粒,制备了性能改进的介孔纳米颗粒网络。这些Au/Mn 3 O 4整体结构由于骨架成分而表现出高反应性,并且由于开孔结构而表现出大的内表面积,表现出用叔丁基过氧化氢将芳香族苯胺选择性氧化成硝基芳烃的巨大潜力。
One-pot synthesis of aldoximes from alkenes <i>via</i> Rh-catalysed hydroformylation in an aqueous solvent system
the water-soluble ligand sulfoxantphos were used as the catalyst system, providing high regioselectivities in the initial hydroformylation. A mixture of water and 1-butanol was used as an environmentallybenignsolventsystem, ensuring sufficient contact of the aqueous catalyst phase and the organic substrate phase. The reaction conditions were systematically optimised by Design of Experiments (DoE) using
通过加氢甲酰化和随后的醛中间体与羟胺水溶液的一锅法缩合,成功地实现了直接从烯烃开始的醛糖肟合成。金属配合物Rh(acac)(CO)2和水溶性配体亚砜基磷用作催化剂体系,在初始加氢甲酰化反应中具有很高的区域选择性。将水和1-丁醇的混合物用作对环境无害的溶剂体系,以确保水性催化剂相与有机底物相充分接触。通过使用1-辛烯作为模型底物的实验设计(DoE),系统地优化了反应条件。所需线性末端醛肟的产率为85%((E / Z)-壬醛肟)的区域选择性达到95%。在优化的条件下,其他末端烯烃也成功地转化为相应的线性醛肟,包括可再生底物。通过记录气体消耗来研究反应速率的差异,从而使周转频率(TOF)> 2000 h -1分别观察到4-乙烯基环己烯和苯乙烯。通过使用醛肟脱水酶作为生物催化剂将醛肟肟转化为相应的线性腈,表明醛肟作为平台中间体的潜力很大。因此,整个反应序列允许由烯烃直接合成线性腈,而水是唯一的副产
In Situ Generation of Nitrile Oxides from NaCl–Oxone Oxidation of Various Aldoximes and Their 1,3-Dipolar Cycloaddition
作者:Guodong Zhao、Lixin Liang、Chi Ho Ethan Wen、Rongbiao Tong
DOI:10.1021/acs.orglett.8b03829
日期:2019.1.4
generation of nitrileoxides through NaCl/Oxone oxidation of aldoximes and their dipolar cycloaddition. The key feature is the use of a green chemistry approach to address the substrate scope of aldoximes: broad scope (aliphatic, aromatic, and alkenyl aldoximes) without production of organic byproducts derived from oxidant and/or catalyst. Importantly, NaCl/Oxone-promoted three-component cycloaddition of aldehyde
Phosphorus tri-iodide (PI3), a powerful deoxygenating agent
作者:Jean Noel Denis、Alain Krief
DOI:10.1039/c39800000544
日期:——
On reaction with PI3 sulphoxides, selenoxides, aldehyde oximes, and primary nitroalkanes are trans-formed to sulphides, selenides, and nitriles, respectively.