NHC-Catalyzed Reaction of Enals with Hydroxy Chalcones: Diastereoselective Synthesis of Functionalized Coumarins
作者:Anup Bhunia、Atanu Patra、Vedavati G. Puranik、Akkattu T. Biju
DOI:10.1021/ol400562z
日期:2013.4.5
The N-heterocyclic carbene-catalyzed annulation of enals with 2′-hydroxy chalcones afford cyclopentane-fused coumarin derivatives with an excellent level of diastereocontrol. The reaction tolerates a broad range of functional groups; 25 examples are given, and a preliminary mechanistic investigation is provided.
Mosquito larvicidal studies of some chalcone analogues and their derived products: structure–activity relationship analysis
作者:Naznin A. Begum、Nayan Roy、Rajibul A. Laskar、Kunal Roy
DOI:10.1007/s00044-010-9305-6
日期:2011.3
A series of chalcone analogues and some of their derivatives were synthesized and subjected to the mosquito larvicidal study. Chalcones having electron releasing group(s) on either ring A or ring B showed high toxicity. Electron withdrawing group(s), especially at ring B, reduced the activity of chalcones. The activity was abruptly decreased due to replacement of ring A by CH3, extension of conjugation
In an effort to develop new antimicrobial agents, a series of chalconederivatives, 3-60, were prepared by Claisen-Schmidt condensation of appropriate acetophenones and 2-furyl methyl ketones with appropriate aromatic aldehydes, furfural, and thiophene-2-carbaldehyde in an aqueous solution of NaOH and EtOH at room temperature. The synthesized compounds were characterized by means of their IR- and NMR-spectral
Design, synthesis, and biological evaluation of <i>Helicobacter pylori</i>
inosine 5′-monophosphate dehydrogenase (<i>Hp</i>
IMPDH) inhibitors
作者:Niteshkumar U. Sahu、Gayathri Purushothaman、Vijay Thiruvenkatam、Prashant S. Kharkar
DOI:10.1002/ddr.21467
日期:2019.2
Inosine 5′‐monophosphate dehydrogenase (IMPDH) catalyzes a crucial step in the biosynthesis of guanine nucleotides. Being a validated target for immunosuppressive, antiviral, and anticancer drug development, lately it has been exploited as a promising target for antimicrobial therapy. Extending our previous work on Mycobacterium tuberculosis IMPDH, GuaB2, inhibitor development, we screened a set of
Spectroscopic analysis by NMR, FT-Raman, ATR-FTIR, and UV-Vis, evaluation of antimicrobial activity, and in silico studies of chalcones derived from 2-hydroxyacetophenone
作者:Jayze da Cunha Xavier、Francisco W.Q. de Almeida-Neto、Janaína E. Rocha、Thiago S. Freitas、Priscila R. Freitas、Ana C.J. de Araújo、Priscila T. da Silva、Carlos E.S. Nogueira、Paulo N. Bandeira、Márcia M. Marinho、Emmanuel S. Marinho、Nitin Kumar、Antônio C.H. Barreto、Henrique D.M. Coutinho、Murilo S.S. Julião、Hélcio S. dos Santos、Alexandre M.R. Teixeira
DOI:10.1016/j.molstruc.2021.130647
日期:2021.10
ciprofloxacin, penicillin, and erythromycin antibiotics were tested against multiresistant strains of Staphylococcus aureus. It was also verified by in vitro and in silico studeis the capacity of these chalcones to inhibit the NorA efflux pump. The MICs values of ciprofloxacin were reduced in the presence of all tested chalcones. For norfloxacin antibiotic, the chalcones A1, A4, A5 and A6 promoted the reduced