[EN] NEW COMPOUNDS USEFUL FOR THE TREATMENT OF OBESITY, TYPE II DIABETES AND CNS DISORDERS [FR] COMPOSES UTILES POUR LE TRAITEMENT DE L'OBESITE, DU DIABETE DE TYPE II ET DES TROUBLES DU SYSTEME NERVEUX CENTRAL
By employing reusable nanocobalt oxides as the catalysts, a site-specific oxidative C–H chalcogenation of (hetero)aryl-fused cyclicamines with various thiols and diselenides is presented for the first time. The reaction proceeds selectively at the sites of the (hetero)aryl rings para to the N atom, and enables access to a wide array of chalcogenyl N-heteroarenes. The merits of the transformation involve
通过使用可重复使用的纳米钴氧化物作为催化剂,首次提出了(杂)芳基稠合的环状胺与各种硫醇和二硒化物的位点特异性氧化C–H硫属元素化。该反应在(杂)芳环的位点选择性地进行对位的N原子,并且使得获得了广泛阵列chalcogenyl的N-杂芳烃的。该转化的优点包括高的步长和原子效率,优异的底物和功能相容性,操作简便性以及使用自然丰富的Co / O 2系统。目前的工作为从容易获得的原料中选择性合成功能性N-杂芳烃提供了基础。
Dimsyl Anion Enables Visible‐Light‐Promoted Charge Transfer in Cross‐Coupling Reactions of Aryl Halides
作者:Lei Pan、Maria Victoria Cooke、Amara Spencer、Sébastien Laulhé
DOI:10.1002/adsc.202101052
日期:2022.1.18
A methodology is reported for visible-light-promoted synthesis of unsymmetrical chalcogenides enabled by dimsyl anion in the absence of transition-metals or photoredoxcatalysts. The cross-coupling reaction between aryl halides and diaryl dichalcogenides proceeds with electron-rich, electron-poor, and heteroaromatic moieties. Mechanistic investigations using UV-Vis spectroscopy, time-dependent density
Synergistic cooperative effect of CF<sub>3</sub>SO<sub>2</sub>Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation
作者:Kai-Jian Liu、Zheng Wang、Ling-Hui Lu、Jin-Yang Chen、Fei Zeng、Ying-Wu Lin、Zhong Cao、Xianyong Yu、Wei-Min He
DOI:10.1039/d0gc02663h
日期:——
visible-light-initiated oxygenation of sulfides at ambient temperature under transition-metal-, additives-free and minimal solvent conditions. The synergistic catalytic efforts between CF3SO2Na and 2-butoxyethyl ether represents the key promoting factor for the reaction.
一种安全,实用,环保的方法,可在环境温度下,无过渡金属,无添加剂且溶剂最少的条件下,通过可见光引发的硫化物氧合转换合成亚砜和砜。CF 3 SO 2 Na和2-丁氧基乙基醚之间的协同催化作用是反应的关键促进因素。
Selective oxidation of (hetero)sulfides with molecular oxygen under clean conditions
作者:Kai-Jian Liu、Ji-Hui Deng、Jie Yang、Shao-Feng Gong、Ying-Wu Lin、Jun-Yi He、Zhong Cao、Wei-Min He
DOI:10.1039/c9gc03713f
日期:——
into distinct high-value products is a particularly attractive concept and a daunting synthetic challenge. In the present work, the first example of efficient and selectiveoxidation of sulfides to sulfones and sulfoxides using molecularoxygen under clean conditions was established.
Carbon-Sulfur Bond Formation of Challenging Substrates at Low Temperature by Using Pd-PEPPSI-IPent
作者:Mahmoud Sayah、Michael G. Organ
DOI:10.1002/chem.201102158
日期:2011.10.10
bromides and chlorides has been achieved under the most mild temperatures yet reported (i.e., room temperature to 40 °C). The bulk afforded by the di‐2,6‐(3‐propylphenyl)imidazolium‐derived Pd‐PEPPSI‐IPent catalyst is believed to actively promote the critical reductive elimination step of the catalytic cycle, thereby eliminating the formation of poisonous off‐cycle dimeric resting states that have plagued