955024-56-3Relevant academic research and scientific papers
Alkene Synthesis by Photo-Wolff-Kischner Reaction of Sulfur Ylides and N-Tosylhydrazones
Gao, Pan-Pan,Yan, Dong-Mei,Bi, Ming-Hang,Jiang, Min,Xiao, Wen-Jing,Chen, Jia-Rong
supporting information, p. 14195 - 14201 (2021/09/20)
A visible-light-driven and room temperature photo-Wolff-Kischner reaction of sulfur ylides and N-tosylhydrazones has been developed for the first time to provide modular access to alkene synthesis. The high functional group tolerance and broad substrate scope were demonstrated by more than 60 examples. Both E- and Z-olefinic stereochemistry in the products could be controlled with excellent stereoselectivity. A series of mechanistic studies support that the reaction should proceed through a radical-carbanion crossover pathway, specifically involving addition of photo-generated sulfur ylide radical cations to N-tosylhydrazones to form carbanions and subsequent Wolff-Kischner process.
Chalcones and bis-chalcones analogs as DPPH and ABTS radical scavengers
Bale, Adebayo Tajudeen,Salar, Uzma,Khan, Khalid Mohammed,Chigurupati, Sridevi,Fasina, Tolulope,Ali, Farman,Ali, Muhammad,Sekhar Nanda, Sitansu,Taha, Muhammad,Perveen, Shahnaz
, p. 249 - 257 (2021/04/21)
Background: A number of synthetic scaffolds, along with natural products, have been identified as potent antioxidants. The present study deals with the evaluation of varyingly substituted, medicinally distinct class of compounds “chalcones and bis-chalcon
Chalcones and bis-chalcones: As potential α-amylase inhibitors; synthesis, in vitro screening, and molecular modelling studies
Tajudeen Bale, Adebayo,Mohammed Khan, Khalid,Salar, Uzma,Chigurupati, Sridevi,Fasina, Tolulope,Ali, Farman,Kanwal,Wadood, Abdul,Taha, Muhammad,Sekhar Nanda, Sitanshu,Ghufran, Mehreen,Perveen, Shahnaz
, p. 179 - 189 (2018/05/24)
Despite of a diverse range of biological activities associated with chalcones and bis-chalcones, they are still neglected by the medicinal chemist for their possible α-amylase inhibitory activity. So, the current study is based on the evaluation of this c
Multicomponent Cascade Synthesis of Biaryl-Based Chalcones in Pure Water and in an Aqueous Micellar Environment
Armenise, Nicola,Malferrari, Danilo,Ricciardulli, Sara,Galletti, Paola,Tagliavini, Emilio
supporting information, p. 3177 - 3185 (2016/07/19)
The challenging multicomponent cascade synthesis of biaryl-based chalcones was carried out in pure water and in an aqueous micellar system. The first step of the protocol was a simple Pd-catalysed, ligand-free, and aerobic Suzuki–Miyaura reaction in aqueous medium. This proved to be extremely efficient for the coupling of aryl and heteroaryl bromides with different arylboronic acids. Subsequently, the resulting intermediates underwent an in-situ aldol condensation reaction to give biaryl(hetero)chalcones in good to excellent yields. When the protocol was applied to highly lipophilic or less reactive reagents, micellar catalysis was required for good results. To achieve this, we successfully used a new surfactant obtained from renewable resources that we recently designed. Furthermore, using this additive, the catalytic system can be repeatedly recycled without significant loss of activity.
Water compatible multicomponent cascade suzuki/heck-aldol, suzuki-aldol-suzuki, and aldol-suzuki-aldol reactions: An ecofriendly paradigm for multiple carbon-carbon bond formation in one pot
Kumar, Rajesh,Richa,Andhare, Nitin H.,Shard, Amit,Sinha, Arun K.
supporting information, p. 14798 - 14803 (2013/11/06)
Aryls in hot water: A versatile strategy has been devised for the synthesis of biologically active biaryl(hetero)chalcones from readily available precursors (see scheme). The method is step, pot, and carbon economic, ligand-free, devoid of toxic reagents/solvents, and has a wide substrate scope. Copyright
Traceless sulfone linker cleavage triggered by ozonolysis: solid-phase synthesis of diverse α-β-unsaturated carbonyl compounds
Chang, Yi-Fan,Jiang, Yi-Rui,Cheng, Wei-Chieh
, p. 543 - 547 (2008/04/13)
The highly efficient and convenient protocol to prepare diverse α,β-unsaturated aldehydes, ketones, and acids via the parallel solid-phase synthesis is developed. The key sulfone linker cleavage strategy is performed by ozonolysis to generate a carbonyl moiety followed by base-mediated polymer-bound sulfinate elimination to release our desired molecules from the resin. All α,β-unsaturated carbonyl compounds are prepared in good purities and yields without further purification.
