Redox‐Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C−H Di‐ and Trifluoromethoxylation
作者:Johnny W. Lee、Sanghyun Lim、Daniel N. Maienshein、Peng Liu、Ming‐Yu Ngai
DOI:10.1002/anie.202009490
日期:2020.11.23
Applications of TEMPO. catalysis for the development of redox‐neutral transformations are rare. Reported here is the first TEMPO.‐catalyzed, redox‐neutralC−Hdi‐ and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional‐group tolerance, and can be employed for the late‐stage functionalization of complex druglike molecules. Kinetic measurements
TEMPO 的应用。氧化还原中性转化发展的催化作用很少见。这里报道的是第一个TEMPO 。(杂)芳烃的催化氧化还原中性 C−H 二氟甲氧基化和三氟甲氧基化。该反应表现出广泛的底物范围,具有较高的官能团耐受性,可用于复杂药物分子的后期功能化。动力学测量、催化中间体的分离和重新研究、UV/Vis 研究和 DFT 计算支持了所提出的氧化 TEMPO 。/TEMPO +氧化还原催化循环。机理研究还表明Li 2 CO 3在防止催化剂失活方面发挥着重要作用。这些发现将为通过氧化还原中性 TEMPO 设计和开发新型反应提供新的见解。催化。
Chlorodifluoromethyl phenyl sulfone: a novel non-ozone-depleting substance-based difluorocarbene reagent for O- and N-difluoromethylations
Chlorodifluoromethyl phenyl sulfone, a previously unknown compound that can be readily prepared from non-ODS-based precursors, was found to act as a robust difluorocarbene reagent for O- and N-difluoromethylations.
[EN] SPIROPIPERIDINE ALLOSTERIC MODULATORS OF NICOTINIC ACETYLCHOLINE RECEPTORS<br/>[FR] MODULATEURS ALLOSTÉRIQUES DE SPIROPIPÉRIDINE DE RÉCEPTEURS NICOTINIQUES DE L'ACÉTYLCHOLINE
申请人:MERCK SHARP & DOHME
公开号:WO2020223136A1
公开(公告)日:2020-11-05
The present disclosure relates to compounds of formula (I) that are useful as modulators of 7α nAChR, compositions comprising such compounds, and the use of such compounds for preventing, treating, or ameliorating disease, particularly disorders of the central nervous system such as cognitive impairments in Alzheimer's disease, Parkinson's disease, and schizophrenia, as well as for L-DOPA induced-dyskinesia and inflammation.
Picoline derivative useful as gastric acid secretion inhibitors
申请人:Byk Gulden Lomberg Chemische Fabrik GmbH
公开号:US04686230A1
公开(公告)日:1987-08-11
Picoline derivatives of the formula I ##STR1## wherein the substituents have the meanings given in the description, and their salts are new compounds having a pronounced protective action on the stomach.
[EN] SUBSTITUTED FIVE-MEMBERED AZA-RING COMPOUND AND USE THEREOF IN DRUG<br/>[FR] COMPOSÉ À CYCLE AZA SUBSTITUÉ À CINQ CHAÎNONS ET SON UTILISATION EN TANT QUE MÉDICAMENT<br/>[ZH] 取代的氮杂五元环类化合物及其在药物中的应用