41011-01-2Relevant academic research and scientific papers
Novel BuChE-IDO1 inhibitors from sertaconazole: Virtual screening, chemical optimization and molecular modeling studies
Zhou, You,Lu, Xin,Du, Chenxi,Liu, Yijun,Wang, Yifan,Hong, Kwon Ho,Chen, Yao,Sun, Haopeng
, (2021/01/07)
In our effort towards the identification of novel BuChE-IDO1 dual-targeted inhibitor for the treatment of Alzheimer's disease (AD), sertaconazole was identified through a combination of structure-based virtual screening followed by MM-GBSA rescoring. Preliminary chemical optimization was performed to develop more potent and selective sertaconazole analogues. In consideration of the selectivity and the inhibitory activity against target proteins, compounds 5c and 5d were selected for the next study. Further modification of compound 5c led to the generation of compound 10g with notably improved selectivity towards BuChE versus AChE. The present study provided us with a good starting point to further design potent and selective BuChE-IDO1 inhibitors, which may benefit the treatment of late stage AD.
Ru-Tethered (R,R)-TsDPEN with DMAB as an efficient catalytic system for high enantioselective one-pot synthesis of chiral β-aminolviaasymmetric transfer hydrogenation
Mishra, Ashish A.,Bhanage, Bhalchandra M.
supporting information, p. 5357 - 5362 (2021/04/06)
This work reflects Ru-tethered-TsDPEN as an active chiral catalyst for one pot selective synthesis of optically active α-substituted alcohols and its derivatives from α-bromo ketones in the presence of dimethylamine borane (DMAB) as the hydrogen source. Various Ru-chiral catalysts have been screened and the methodology proceededviaa (R,R) Ru-tethered TsDPEN catalyst through asymmetric transfer hydrogenation (ATH) of the in-situ formed ketones to the corresponding chiral β-aminol product. Thus, the Ru-tethered TsDPEN-DMAB catalytic system works efficiently with higher yield and high enantiomeric excess over others for the ATH process. Based on a study ofortho,metaandparasubstituted α-bromo acetophenone derivatives, effective enantioselectivity has been observed fororthosubstituted β-aminol. The mechanism has been optimized depending on product analysis with the help of its kinetic AT-IR study. This work also focusses on the synthesis of various β-amino alcohol derivatives where the effect of an EWG and EDG on enantio-selectivity has been studied.
Base-Catalyzed Intramolecular Defluorination/O-Arylation Reaction for the Synthesis of 3-Fluoro-1,4-oxathiine 4,4-Dioxide
Kang, Lei,Zhang, Jinlong,Yang, Huameng,Qian, Jinlong,Jiang, Gaoxi
supporting information, p. 785 - 789 (2021/04/09)
A novel process involving base-catalyzed intramolecular defluorination/O-arylation of readily available α-fluoro-β-one-sulfones was realized and provided a series of 3-fluoro-1,4-oxathiine 4,4-dioxide derivatives in good to excellent yields. Unlike traditional defluorination reactions with stoichiometric base as the deacid reagent, this process is triggered by a catalytic amount of base (TMG: tetramethylguanidine) and molecular sieves serve as both an adsorbent to remove HF acid and an activator to assist C-F bond cleavage.
An umpolung oxa-[2,3] sigmatropic rearrangement employing arynes for the synthesis of functionalized enol ethers
Gaykar, Rahul N.,George, Malini,Guin, Avishek,Bhattacharjee, Subrata,Biju, Akkattu T.
supporting information, p. 3447 - 3452 (2021/05/04)
An oxa-[2,3] sigmatropic rearrangement involving arynes is reported featuring the umpolung of ketones, where the C=O bond polarity is reversed. The in situ-generated sulfur ylides from β-keto thioethers and arynes undergo efficient rearrangement allowing the facile and robust synthesis of functionalized enol ethers in high yields and excellent functional group compatibility. Preliminary mechanistic studies rule out the possibility of Pummerer-type rearrangement operating in this case.
BuChE-IDO1 inhibitor as well as preparation method and application thereof
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Paragraph 0070-0072; 0106-0107, (2021/04/26)
The invention relates to the field of medicines, and particularly discloses a BuChE-IDO1 inhibitor as well as a preparation method and application thereof. The 7-chlorine-3-substituted benzothiophene part of sertaconazole is chemically modified, the influence of the 7-chlorine-3-substituted benzothiophene part of sertaconazole on the in-vitro inhibitory activity of AChE, BuChE and IDO1 is explored, the target compound is further optimized, and the technical problems that an existing BuChE-IDO1 inhibitor is poor in pertinence and safety are solved. What is explored is that an appropriate substituent group introduced to a 2-benzothiazole ring can form additional interaction with surrounding amino acids and heme iron, so that the binding affinity of the analogue with BuChE and IDO1 is increased, and a new idea is broadened for more efficient and targeted treatment of advanced AD diseases.
Unravelling the allosteric targeting of phgdh at the act-binding domain with a photoactivatable diazirine probe and mass spectrometry experiments
Dochain, Simon,Feron, Olivier,Frédérick, Rapha?l,Ravez, Séverine,Spillier, Quentin,Thabault, Léopold,Vertommen, Didier
supporting information, (2021/06/28)
The serine biosynthetic pathway is a key element contributing to tumor proliferation. In recent years, targeting of phosphoglycerate dehydrogenase (PHGDH), the first enzyme of this pathway, intensified and revealed to be a promising strategy to develop ne
Oxidation Potential-Guided Electrochemical Radical-Radical Cross-Coupling Approaches to 3-Sulfonylated Imidazopyridines and Indolizines
Kim, Wansoo,Kim, Hun Young,Oh, Kyungsoo
, p. 15973 - 15991 (2021/07/26)
Oxidation potential-guided electrochemical radical-radical cross-coupling reactions between N-heteroarenes and sodium sulfinates have been established. Thus, simple cyclic voltammetry measurement of substrates predicts the likelihood of successful radical-radical coupling reactions, allowing the simple and direct synthetic access to 3-sulfonylated imidazopyridines and indolizines. The developed electrochemical radical-radical cross-coupling reactions to sulfonylated N-heteroarenes boast the green synthetic nature of the reactions that are oxidant- and metal-free.
Acridine Orange Hemi(Zinc Chloride) Salt as a Lewis Acid-Photoredox Hybrid Catalyst for the Generation of α-Carbonyl Radicals
Das, Sanju,De Sarkar, Suman,Mandal, Tanumoy
supporting information, (2021/12/10)
A readily accessible organic-inorganic hybrid catalyst is reported for the reductive fragmentation of α-halocarbonyl compounds. The robust hybrid catalyst is a self-stabilizing combination of ZnCl2 Lewis acid and acridine orange as the photoactive organic dye. Mechanistic specifics of this hybrid catalyst have been studied in detail using both photophysical and electrochemical experiments. A systematic study enabled the discovery of the appropriate Lewis acid for the effective LUMO stabilization of α-halocarbonyl compounds and thereby lowering of reduction potential within the range of a standard organic dye. This strategy resolves the issues like dehalogenative hydrogenation or homo-coupling of alkyl radicals by guiding the photoredox cycle through an oxidative quenching pathway. The cooperativity between the photoactive organic dye and the Lewis acid counterparts empowers functionalization with a wide range of coupling partners through efficient and controlled generation of alkyl radicals and serves as an appropriate alternative to the expensive late transition metal-based photocatalysts. To demonstrate the application potential of this cooperative catalytic system, four different synthetic transformations of α-carbonyl bromides were explored with broad substrate scopes.
A practical synthesis of α-bromo/iodo/chloroketones from olefins under visible-light irradiation conditions
Wang, Zhihui,Wang, Lei,Wang, Zhiming,Li, Pinhua,Zhang, Yicheng
supporting information, p. 429 - 432 (2020/02/29)
A practical synthesis of α-bromo/iodo/chloroketones from olefins under visible-light irradiation conditions has been developed. In the presence of PhI(OAc)2 as promoter and under ambient conditions, the reactions of styrenes and triiodomethane undergo the transformation smoothly to deliver the corresponding α-iodoketones without additional photocatalyst in good yields under sunlight irradiation. Meanwhile, the reactions of styrenes with tribromomethane and trichloromethane generate the desired α-bromoketones and α-chloroketones in high yields by using Ru(bpy)3Cl2 as a photocatalyst under blue LED (450–455 nm) irradiation.
Thiazole ring-containing amide compounds as well as preparation method and application thereof
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Paragraph 0044; 0051; 0068; 0071; 0136; 0141; 0220; 0225, (2021/06/23)
The invention discloses thiazole ring-containing amide compounds as well as a preparation method and application thereof, and belongs to the field of chemical technologies and pesticides. According to the present invention, p-phenylenediamine is adopted as a raw material to synthesize a series of the thiazole ring-containing amide compounds, and the synthesized thiazole ring-containing amide compounds have good inhibition effects on Xanthomonas oryzae pv.Oryza (Xoo), Xanthomonas oryzae pv.Oryzcola (Xoc) and Xanthomonas axonophora pv.Citri (Xac) in agricultural diseases and insect pests, and can be used for preparing the anti-plant bacterium agent.
