Sequential multicomponent catalytic synthesis of pyrrole-3-carboxaldehydes: evaluation of antibacterial and antifungal activities along with docking studies
A catalytic asymmetric intramolecular homologation of simple ketones with α‐diazoesters was firstly accomplished with a chiral N,N′‐dioxide–Sc(OTf)3 complex. This method provides an efficient access to chiral cyclic α‐aryl/alkyl β‐ketoesters containing an all‐carbon quaternary stereocenter. Under mild conditions, a variety of aryl‐ and alkyl‐substituted ketone groups reacted with α‐diazoester groups
AbstractCleavage and reconstitution of a bond in the piperidine ring of ifenprodil (1) leads to 7‐methoxy‐2,3,4,5‐tetrahydro‐1H‐3‐benzazepin‐1‐ols, a novel class of NR2B‐selective NMDA receptor antagonists. The secondary amine 7‐methoxy‐2,3,4,5‐tetrahydro‐1H‐3‐benzazepin‐1‐ol (12), which was synthesized in six steps starting from 2‐phenylethylamine 3, represents the central building block for the introduction of several N‐linked residues. A distance of four methylene units between the basic nitrogen atom and the phenyl residue in the side chain results in high NR2B affinity. The 4‐phenylbutyl derivative 13 (WMS‐1405, Ki=5.4 nM) and the conformationally restricted 4‐phenylcyclohexyl derivative 31 (Ki=10 nM) represent the most potent NR2B ligands of this series. Whereas 13 shows excellent selectivity, the 4‐phenylcyclohexyl derivative 31 also interacts with σ1 (Ki=33 nM) and σ2 receptors (Ki=82 nM). In the excitotoxicity assay the phenylbutyl derivative 13 inhibits the glutamate‐induced cytotoxicity with an IC50 value of 360 nM, indicating that 13 is an NMDA antagonist.
A combined computational and experimental investigation of the oxidative ring-opening of cyclic ethers by oxoammonium cations
作者:Jacob. J. Loman、Emma R. Carnaghan、Trevor A. Hamlin、John M. Ovian、Christopher B. Kelly、Michael A. Mercadante、Nicholas E. Leadbeater
DOI:10.1039/c6ob00347h
日期:——
The propensity of oxoammonium cations to facilitate the oxidative ring-opening of cyclic ethers to their corresponding distal hydroxy ketones is investigated. The reaction has been evaluated using experimental and computational methods to gain deeper insight into trends in reactivity.
Sequential multicomponent catalytic synthesis of pyrrole-3-carboxaldehydes: evaluation of antibacterial and antifungal activities along with docking studies
作者:Nisar A. Mir、Panduga Ramaraju、Satheeshvarma Vanaparthi、Sachin Choudhary、Rajnish P. Singh、Preetika Sharma、Rajni Kant、Rajpal Singh、Murugesan Sankaranarayanan、Indresh Kumar
DOI:10.1039/d0nj03575k
日期:——
A sequential multicomponent method is developed to access highly substituted N-arylpyrrole-3-carbaldehydes and tested for antibacterial and antifungal activities against bacterial strains.