Montmorillonite Clay-Promoted, Solvent-Free Cross-Aldol Condensations under Focused Microwave Irradiation
作者:Damiano Rocchi、Juan González、J. Menéndez
DOI:10.3390/molecules19067317
日期:——
An environmentallybenign, clean and general protocol was developed for the synthesis of aryl and heteroaryl trans-chalcones. This method involved solvent-free reaction conditions undermicrowaveirradiation in the presence of a clay-based catalyst, and afforded the target compounds in good yields and short reaction times. Furthermore, the same conditions allowed the synthesis of symmetrical, diarylmethylene-α
coefficient plots indicate that steric interactions between the chalcones and the target are of major importance for the potencies of the compounds. A comparison of the coefficient plots for the antileishmanial effect and the lymphocyte-suppressing activity discloses significant differences which should make it possible to design chalcones having a high antileishmanial activity without suppressing the
Synthetic Chalcone Derivatives as Inhibitors of Cathepsins K and B, and Their Cytotoxic Evaluation
作者:Suelem Demuner Ramalho、Aline Bernades、Giulio Demetrius、Caridad Noda-Perez、Paulo Cezar Vieira、Caio Yu dos Santos、James Almada da Silva、Manoel Odorico de Moraes、Kristiana Cerqueira Mousinho
DOI:10.1002/cbdv.201200344
日期:2013.11
(15) showed significant cytotoxicities. The most effective compound was 15, which showed high cytotoxic activity with an IC50 value lower than 1 μg/ml, and no selectivity on the tumor cells evaluated. Substituents at C(4) of ring B were found to be essential for cytotoxicity. In addition, it was also demonstrated that some of these chalcones are moderate inhibitors of cathepsinK and have no activity
A New Lewis Acid System Palladium/TMSCl for Catalytic Aldol Condensation of Aldehydes with Ketones
作者:Yulin Zhu、Yuanjiang Pan
DOI:10.1246/cl.2004.668
日期:2004.6
catalyzed the aldolcondensation reactions of different ketones with aldehydes in the presence of trimethylsilyl chloride (TMSCI). The following reactions were investigated: (1) aromaticaldehydes with cycloalkanones, (2) aromaticaldehydes with aromatic ketones, (3) cycloalkanones with aliphatic aldehydes, and (4) the self-condensation reactions of aliphatic aldehydes and cycloalkanones.
<i>Michael</i>Reactions of α-Unsubstituted Trisubstituted 1<i>H</i>-Pyrroles
作者:Rainer Lüönd、Reinhard Neier
DOI:10.1002/hlca.19910740111
日期:1991.1.30
To obtain stable derivatives of α-unsubstituted pyrroles, the reaction of the test pyrrole 9 with a series of chalcones 14a–h were studied. Michael adducts 16b–h could be isolated. In order to synthesize coloured derivatives, the reaction of different pyrroles 9, 21, 23, and 25 with diphenylpropynone 19 was investigated. In these cases, too, Michael-addition products were formed. The intense absorption