Substituted 2-[(2-benzimidazolylsulfinyl)methyl]anilines as potential inhibitors of H+/K+ ATPase
摘要:
A series of substituted 2-[(2-benzimidazolylsulfinyl)methyl]anilines were synthesized as potential inhibitors of the acid secretory enzyme H+/K+ ATPase. Substitutions on the aniline nitrogen atom resulted in potent enzyme inhibition in vitro but weak activity in gastric fistula dogs. Electron-donating substituents on the aniline ring enhanced in vitro and in vivo potency relative to the unsubstituted analogue. The potency showed a correlation to the calculated pKa of the aniline nitrogen atom. Substitutions on the aniline and benzimidazole rings did not further enhance potency. Di- and trisubstituted aniline derivatives were potent inhibitors of the enzyme system. The preferred combination of substituents were a methoxy group on the benzimidazole ring and a single alkyl group on the aniline ring. One such compound, 76, was an effective inhibitor of acid secretion in the dog and was selected for further pharmacological study.
Site-Selective C–H Functionalization of (Hetero)Arenes via Transient, Non-symmetric Iodanes
作者:Stacy C. Fosu、Chido M. Hambira、Andrew D. Chen、James R. Fuchs、David A. Nagib
DOI:10.1016/j.chempr.2018.11.007
日期:2019.2
A strategy for C–Hfunctionalization of arenes and heteroarenes has been developed to allow site-selective incorporation of various anions, including Cl, Br, OMs, OTs, and OTf. This approach is enabled by in situ generation of reactive, non-symmetric iodanes by combining anions and bench-stable PhI(OAc)2. The utility of this mechanism is demonstrated via para-selective chlorination of medicinally relevant
Pd-Catalyzed Intermolecular <i>ortho</i>-C−H Amidation of Anilides by <i>N</i>-Nosyloxycarbamate
作者:Ka-Ho Ng、Albert S. C. Chan、Wing-Yiu Yu
DOI:10.1021/ja106364r
日期:2010.9.22
A palladium-catalyzed ortho-C-H amidation of anilides by N-nosyloxycarbamates was developed for the synthesis of 2-aminoanilines. This reaction can be carried out under relatively mildconditions and exhibits excellent regioselectivity and functional group tolerance. The amidation reaction is probably initiated by rate-limiting C-H cyclopalladation (k(H)/k(D) = 3.7) to form an arylpalladium complex
DFT-Guided Phosphoric-Acid-Catalyzed Atroposelective Arene Functionalization of Nitrosonaphthalene
作者:Wei-Yi Ding、Peiyuan Yu、Qian-Jin An、Katherine L. Bay、Shao-Hua Xiang、Shaoyu Li、Ying Chen、K.N. Houk、Bin Tan
DOI:10.1016/j.chempr.2020.06.001
日期:2020.8
naphthalene via chiral phosphoric acid catalysis. This strategy enables efficient construction of atropisomeric indole-naphthalenes and indole-anilines with excellent stereocontrol. Density functional theory (DFT) calculations provide further insights into the origins of enantioselectivity and the reaction mechanisms. The successful application in the synthesis of NOBINs (2-amino-2′-hydroxy-1,1′-binaphthyl)
Carbonylation of various organolithium reagents. A novel approach to heterocycles via intramolecular trapping of aromatic acyllithiums
作者:Keith Smith、Gamal A. El-Hiti、Gareth J. Pritchard、Anna Hamilton
DOI:10.1039/a903467f
日期:——
Doubly lithiated N-pivaloylanilines react smoothly with carbon monoxide at 0 °C to give 3-tert-butyl-3-hydroxy-2,3-dihydroindol-2-ones in good yields. Similarly, carbonylation of doubly lithiated 4-pivaloylamino- and 2-pivaloylaminopyridines at 0 °C affords the corresponding 5-aza- and 7-aza-3-tert-butyl-3-hydroxy-2,3-dihydroindol-2-ones, respectively, in good yields. However, carbonylation of doubly lithiated N-pivaloyl-o-toluidines takes a different course due to direct intramolecular cyclisation of the dilithio reagents to afford 2-tert-butylindoles without uptake of carbon monoxide.
Structurally Nontraditional Benzo[
<i>c</i>
]cinnoline‐Based Electron‐Transporting Materials with 3D Molecular Interaction Architecture
作者:Yang Shi、Zhengyang Bin、Jiahui Liu、Weiguo Han、Ge Yang、Bowen Lei、Jingsong You
DOI:10.1002/anie.202202898
日期:2022.6.13
A “3D molecular interaction architecture” strategy has been put forward to design high-performance electron-transportingmaterials (ETMs). As a proof-of-concept, a type of structurallynontraditional ETMs with the benzo[c]cinnoline (BZC) skeleton exhibit an exceedingly high glass transition temperature, a fast electron mobility and outstanding electroluminescent performances in organic light-emitting