Tandem Copper(I)‐Catalyzed
<i>N</i>
‐Arylation–1,4‐Conjugate Addition to Access Tetrahydroacridinones
作者:Jyoti M. Honnanayakanavar、Purna Chandra Behera、Surisetti Suresh
DOI:10.1002/adsc.202200877
日期:2022.12.8
copper-catalyzed tandem process integrating N-arylation and 1,4-conjugate addition is disclosed through the reaction of cyclic enaminones and ortho-halochalcones. The reaction appears to proceed through chemoselective arylation on the nitrogen of enaminone with ortho-halochalcones and Michael addition of α-carbon of the enaminone to the chalcone to furnish a diverse range of tricyclic tetrahydroacridinone derivatives
Ultrasound-Promoted Synthesis of 3-(Thiophen-2-yl)-4,5-dihydro-1<i>H</i>-pyrazole-1-carboximidamides and Anticancer Activity Evaluation in Leukemia Cell Lines
作者:Eric F. S. dos Santos、Nathália M. Cury、Tainara A. do Nascimento、Cristiano Raminelli、Gleison A. Casagrande、Claudio M. P. Pereira、Euclésio Simionatto、José A. Yunes、Lucas Pizzuti
DOI:10.5935/0103-5053.20160166
日期:——
3-(Thiophen-2-yl)-4,5-dihydro-1H-pyrazole-1-carboximidamides were efficiently prepared through a cyclocondensation of thiophenylchalcones with aminoguanidine hydrochloride under ultrasonic conditions in the presence of KOH and ethanol as a green solvent in short reaction times (15-35 min) and good yields (62-95%). All compounds produced were evaluated against the human Jurkat and RS4; 11 acute lymphoblastic leukemia cell lines of T- and B-cell origin, respectively, and the K562 myelogenous leukemia cell line. Six compounds presented half maximal inhibitory concentration (IC50) values around 15 mu mol L-1 and five compounds presented IC50 values around 40 mu mol L-1 for at least one of the three cell lines analyzed. One compound was not significantly cytotoxic, presenting IC50 value > 100 mu mol L- 1.