Titania-Supported Gold Nanoparticles Catalyze the Selective Oxidation of Amines into Nitroso Compounds in the Presence of Hydrogen Peroxide
作者:Stella Fountoulaki、Petros L. Gkizis、Theodoros S. Symeonidis、Eleni Kaminioti、Athanasia Karina、Ioannis Tamiolakis、Gerasimos S. Armatas、Ioannis N. Lykakis
DOI:10.1002/adsc.201500957
日期:2016.4.28
titania‐supported gold nanoparticles (Au/TiO2) was studied for the selectiveoxidation of amines into nitroso compounds using hydrogen peroxide (H2O2). Gold nanoparticles deposited on Degussa P25 polymorphs of titania (TiO2) have been found to promote the selective formation of a variety of nitroso arenes in high yields and selectivities, even in a large‐scale synthesis. In contrast, alkyl amines are
在本文中,研究了用二氧化钛负载的金纳米颗粒(Au / TiO 2)的催化活性,以利用过氧化氢(H 2 O 2)将胺选择性氧化为亚硝基化合物。已经发现,沉积在二氧化钛(TiO 2)的Degussa P25多晶型物上的金纳米颗粒即使在大规模合成中也能以高收率和选择性促进多种亚硝基芳烃的选择性形成。相反,在所检查的条件下,烷基胺被氧化成相应的肟。动力学研究表明,被给电子基团取代的芳基胺的氧化速度快于具有吸电子功能的相应胺。一系列哈密特动力学分析对-X-取代的芳基胺牵连的电子转移(ET)机制(ρ= -1.15),用于与伴随形成相应的氧化反应ñ -芳基羟胺作为可能的中间。我们还表明,在存在1,3-环己二烯的情况下,芳基胺的氧化方案可导致二烯与原位形成的亚硝基芳烃之间相应的杂Diels-Alder加合物的出色收率。
Multicomponent 1,3-Bifunctionalization of Donor–Acceptor Cyclopropanes with Arenes and Nitrosoarenes
作者:Saikat Das、Constantin G. Daniliuc、Armido Studer
DOI:10.1021/acs.orglett.6b02815
日期:2016.11.4
AlBr3-mediated multicomponent 1,3-bifunctionalization of donor–acceptor cyclopropanes using arenes and nitrosoarenes as coupling partners is presented. In the cascade, a C–C, a C–N, and a C–Br bond is formed. Reactions are easy to conduct and proceed under mild conditions. The γ,γ-disubstituted N-arylated α-amino esters obtained as products are readily further chemically modified rendering the method
Novel compounds of Formula (I) or pharmaceutically acceptable salts thereof, metabolites thereof, isomers thereof, enantiomers thereof or prodrugs thereof of Formula (I)
wherein the substituents are as defined herein, which are useful as therapeutic agents.
The invention provides methods and compositions for treating conditions mediated by Bcr-Abl. The invention also provides methods of using the compounds and/or compositions in the treatment of a variety of diseases and unwanted conditions in subjects.
A Short Preparation of Pyrroloquinoxalinones via a Cascade Reaction of N-Aryl-5-alkylamino-2-nitrosoanilines with Methyl 2-Cyanoalkanoates: Unexpected Direction of Nucleophilic Substitution of Hydrogen
N-Aryl-2-nitrosoanilines possessing 5-alkylamino groups undergo a bisheteroannulation reaction with anions of 2-cyanoalkanecarboxylates resulting in pyrroloquinoxalinone derivatives. The cascade reaction involves condensation of the cyanoester anions with the nitroso group, unusual nucleophilic substitution of hydrogen in the nitrosoaniline-derived intermediate with the second carbanion molecule, and double intramolecular acylation of the amino functions.