Synthesis and discovery of highly functionalized mono- and bis-spiro-pyrrolidines as potent cholinesterase enzyme inhibitors
摘要:
Novel mono and bis spiropyrrolidine derivatives were synthesized via an efficient ionic liquid mediated, 1,3-dipolar cycloaddition methodology and evaluated in vitro for their AChE and BChE inhibitory activities in search for potent cholinesterase enzyme inhibitors. Most of the synthesized compounds displayed remarkable AChE inhibitory activities with IC50 values ranging from 1.68 to 21.85 mu M, wherein compounds 8d and 8j were found to be most active inhibitors against AChE and BChE with IC50 values of 1.68 and 2.75 mu M, respectively. Molecular modeling simulation on Torpedo californica AChE and human BChE receptors, showed good correlation between IC50 values and binding interaction template of the most active inhibitors docked into the active site of their relevant enzymes. (c) 2014 Elsevier Ltd. All rights reserved.
CLEFMA—An anti-proliferative curcuminoid from structure–activity relationship studies on 3,5-bis(benzylidene)-4-piperidones
摘要:
3,5-Bis(benzylidene)-4-piperidones are being advanced as synthetic analogs of curcumin for anti-cancer and anti-inflammatory properties. We performed structure-activity relationship studies, by testing several synthesized 3,5-bis(benzylidene)-4-piperidones for anti-proliferative activity in lung adenocarcinoma H441 cells. Compared to the lead compound 1, or 3,5-bis(2-fluorobenzylidene)-4-piperidone, five compounds were found to be more potent (IC50 <30 mu M), and 16 compounds possessed reduced cell-killing efficacy (IC50 >50 mu M). Based on the observations, we synthesized 4-[3,5-bis(2-chlorobenzyl-idene-4-oxo-piperidine-1-yl)-4-oxo-2-butenoic acid] (29 or CLEFMA) as a novel analog of 1. CLEFMA was evaluated for anti-proliferative activity in H441 cells, and was found to be several folds more potent than compound 1. We did not find apoptotic cell population in flow cytometry, and the absence of apoptosis was confirmed by the lack of caspase cleavage. The electron microscopy of H441cells indicated that CLEFMA and compound 1 induce autophagic cell death that was inhibited by specific autophagy inhibitor 3-methyladenine. The results suggest that the potent and novel curcuminoid, CLEFMA, offers an alternative mode of cell death in apoptosis-resistant cancers. (C) 2010 Elsevier Ltd. All rights reserved.
Dispiropyrrolidinyl-piperidone embedded indeno[1,2-b]quinoxaline heterocyclic hybrids: Synthesis, cholinesterase inhibitory activity and their molecular docking simulation
作者:Natarajan Arumugam、Abdulrahman I. Almansour、Raju Suresh Kumar、D. Kotresha、R. Saiswaroop、S. Venketesh
DOI:10.1016/j.bmc.2019.03.058
日期:2019.6
indono[1,2-b]quinoxaline heterocyclic hybrids 7a-j were synthesized employing multicomponent 1,3-dipolarcycloaddition strategy in [bmim]Br. The azomethine ylide employed is first of its kind and generated in situ from indenoquinoxalinone and l-tryptophan, a combination that has not been employed previously for the in situ generation of azomethine ylides. The synthesized heterocyclic hybrids 7a-j were evaluated
Design, synthesis, and biological evaluation of novel <strong>EF24 </strong>and <strong>EF31 </strong>analogs as potential I&kappa;B kinase &beta; inhibitors for the treatment of pancreatic cancer
作者:Xuemeng Xie、Jinfu Tu、Heyi You、Bingren Hu
DOI:10.2147/dddt.s133172
日期:——
Given the important role that inhibitory kappa B (IκB) kinaseβ (IKKβ) plays in pancreatic cancer (PC) development and progression, inhibitors targeting IKKβ are believed to be increasingly popular as novel anti-PC therapies. Two synthetic molecules, named EF24 and EF31, exhibited favorable potential in terms of inhibition of both IKKβ activity and PC cell proliferation. Aiming to enhance their cellular
Domino Multicomponent Approach for the Synthesis of Functionalized Spiro-Indeno[1,2-b]quinoxaline Heterocyclic Hybrids and Their Antimicrobial Activity, Synergistic Effect and Molecular Docking Simulation
作者:Abdulrahman I. Almansour、Natarajan Arumugam、Raju Suresh Kumar、Dhaifallah M. Al-thamili、Govindasami Periyasami、Karuppiah Ponmurugan、Naif Abdullah Al-Dhabi、Karthikeyan Perumal、Dhanaraj Premnath
DOI:10.3390/molecules24101962
日期:——
dispiropyrrolidine tethered N-styrylpiperidone hybrid heterocycles in moderate to good yield in a single step. These compounds were evaluated for their antimicrobialactivity against bacterial and fungal pathogens, therein compounds 8f, 8h, and 8l displayed significant activity against tested microbial pathogens. The synergistic effect revealed that the combination of compound 8h with streptomycin and vancomycin
Dipolar cycloaddition based multi-component reaction: Synthesis of spiro tethered acenaphthylene–indolizine–pyridinone hybrids
作者:Raju Suresh Kumar、Abdulrahman I. Almansour、Natarajan Arumugam、Govindasami Periyasami、S. Athimoolam、Raju Ranjith Kumar、Mohammad Asad、Abdullah M. Asiri
DOI:10.1016/j.tetlet.2018.07.051
日期:2018.8
novel dispiro acenaphthylene–indolizine–pyridinone hybrid heterocycles have been achieved through one-pot four-component domino 1,3-dipolar cycloaddition–Michael addition–air oxidation sequence of reactions.
Functionalized spirooxindole-indolizine hybrids: Stereoselective green synthesis and evaluation of anti-inflammatory effect involving TNF-α and nitrite inhibition
Stereoselectivesynthesis of a small library of novel spiroheterocyclic hybrids including indolizine, oxindole, and substituted piperidine units has been accomplished in [bmim]Br using a [3 + 2] cycloaddition strategy in good yield and were tested for their anti-inflammatory activities. The effects of compounds (4a-o) against inflammation were studied using carrageenan-induced hind paw oedema, croton