20913-05-7Relevant articles and documents
Silica gel-promoted synthesis of multisubstituted spiroindolenines from tryptamines and γ-chloro-α,β-unsaturated ketones
Liu, Qiang-Qiang,Zheng, Chao,You, Shu-Li
, (2021)
Here we report a one-pot synthesis of multisubstituted spiroindolenines from a series of tryptamine derivatives with γ-chloro-α,β-unsaturated ketones. The reaction sequence consists of base-induced condensation and silica gel-promoted intramolecular Michael addition. The target molecules are afforded in up to 90% yield with up to >20:1 diastereoselectivity.
Formation of epoxychromeno[4,3-c]isoquinolines through diastereoselective one-pot IMDA reaction of 4-chloro-3-[(1E)-3-oxo-3-phenyl-1-propen-1-yl]-2H-chromen-2-one and furfurylamine
Alizadeh, Abdolali,Amir Ashjei Asalemi, Kaveh,Farajpour, Behnaz,Halvagar, Mohammad Reza
, p. 3393 - 3399 (2020)
Abstract: An intramolecular Diels–Alder mediated reaction of (2E)-3-(4-chloro-2-methylene-2H-chromen-3-yl)-1-phenyl-2-propen-1-one, which was obtained in situ from the reaction of 4-chloro-2-oxo-2H-chromene-3-carbaldehyde and Wittig reagent, with furfuryl
Stereoselective Visible-Light Catalyzed Cyclization of Bis(enones): A Viable Approach to the Synthesis of Enantiomerically Enriched Cyclopentane Rings
Medici, Fabrizio,Resta, Simonetta,Presenti, Piero,Caruso, Lucia,Puglisi, Alessandra,Raimondi, Laura,Rossi, Sergio,Benaglia, Maurizio
supporting information, p. 4521 - 4524 (2021/06/12)
Photoredox catalytic cyclization of aryl enones in the presence of visible light, promoted either by metals or organic dyes, represent a valuable strategy for the synthesis of cycloalkanes. The development of a stereoselective version of such transformation, in the presence of the metal-free catalyst Eosin Y was studied, with the aim to realize an efficient protocol for the in-flow synthesis of enantiomerically enriched functionalized cyclopentane rings, taking advantage of the flow reactors technology. The use of a chiral auxiliary on the bisenone to be cyclized offers a straightforward and convenient option to exert a stereocontrol on the light-driven cyclization. By exploiting Evans’ oxazolidinones, the stereoselective light-driven cyclization affords, after the removal of the chiral auxiliary, a functionalized 1,2-trans cyclopentane ring in up to 83/17 enantiomeric ratio. When the reaction was performed in continuo, in a homemade coil photoreactor, high yields were observed. The cyclization was also successfully realized in a 3D-printed mesoreactor, without any change in the diastereoseletctivity of the process.
Substituent effects in the formation of a few acenaphthenone-2-ylidene ketones and their molecular docking studies and in silico ADME profile
A, Jesna,Jacob, Jomon P.,Kuriakose, Daly,Thumpakara, Roshini K.
, (2020/09/15)
We observed intriguing substituent effects in the reaction between 4-substituted acetophenones and acenaphthenequinone in the presence of KOH in methanol. In all cases, expected Claisen-Schimdt condensation was the first step. However, depending on the nature of 4-substituent on acetophenone, the initially formed condensation product remain unchanged or underwent Domino sequence of reactions to give three different 2:2 adducts arising through three distinct pathways. The interactions of acenaphthenone-2-ylidene ketones with the target proteins were performed by molecular docking studies. The prediction of in silico ADME belongings of the synthesized compounds revealed substantial drug-likeness characters based on Lipinski's rules.
