Antiparasitic activity of synthetic curcumin monocarbonyl analogues against Trichomonas vaginalis
作者:Caroline Carapina da Silva、Bruna Silveira Pacheco、Raquel Nascimento das Neves、Mirna Samara Dié Alves、Ângela Sena-Lopes、Sidnei Moura、Sibele Borsuk、Claudio Martin Pereira de Pereira
DOI:10.1016/j.biopha.2018.12.058
日期:2019.3
herein we report the anti-T. vaginalis evaluation of 21 synthetic monocarbonyl analogues of curcumin, which itself has been reported to possess antiparasitic potential. From the in vitro analysis of the synthetic molecules, untreated trophozoites, and metronidazole at 100 μM, it was observed that three curcumin analogues (3a, 3e, and 5e) exhibited anti-T. vaginalis activity comparable to metronidazole
H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>/SiO<sub>2</sub>: An Eco-Friendly Alternative for the Stereo-, Regio- and Chemoselective Claisen-Schmidt Condensation
作者:Bibi Fatemeh Mirjalili、Zahra Zaghaghi
DOI:10.1002/jccs.200800104
日期:2008.6
H 3 PW 12 O 40 /SiO 2 or (PW/SiO 2 ) promotes the regio-, stereo- and chemoselectiveClaisen-Schmidtcondensation with improved yields.
H 3 PW 12 O 40 /SiO 2 或 (PW/SiO 2 ) 促进了区域选择性、立体选择性和化学选择性的 Claisen-Schmidt 缩合,并提高了产率。
Zr(HSO<sub>4</sub>)<sub>4</sub>/SiO<sub>2</sub> as an Efficient Alternative Catalyst for the Claisen-Schmidt Condensation
作者:Bi Bi Fatemeh Mirjalilia、Abddhamid Bamoniri、Masoumeh Alipour、Mohammad Ali Karimi Zarchia
DOI:10.1515/znb-2008-1213
日期:2008.12.1
Zr(HSO4)4/SiO2 promotes the regio-, stereo- and chemoselectiveClaisen-Schmidtcondensation of aromatic aldehydes with ketones under solvent-free conditions with improved yields. The work-up of the reaction mixture is simple, and the catalyst is easily removed from the products by simple filtration.
Anti-melanogenesis screening of 47 synthesized curcumin-like diarylpentanoid analogues was performed to show that some had a potent inhibitory effect on the melanogenesis in B16 melanoma cells. Their actions were considered to be mostly due to tyrosinase inhibition, tyrosinase expression inhibition, and melanin pigment degradation. The structure–activity relationships of those curcumin-like diarylpentanoid analogues which inhibited the melanogenesis and tyrosinase activity were also discussed. Of those compounds assayed, (2E,6E)-2,6-bis(2,5-dimethoxybenzylidene)cyclohexanone showed the most potent anti-melanogenesis effect, the mechanism of which is considered to be the degradation of the melanin pigment in B16 melanoma cells, affecting neither the tyrosinase activity nor tyrosinase expression.
A Convenient Synthesis of α,α′-Bis(substitutedbenzylidene)cycloalkanones
作者:Taich Nakano、Toshihiko Migita
DOI:10.1246/cl.1993.2157
日期:1993.12
The Cp2TiPh2-catalyzed reaction of cyclopentanone or cyclohexanones with benzaldehydes brought about the cross-aldol condensation to give the corresponding 2,5-bis(substitutedbenzylidene)cyclopentanones or 2,6-bis(substitutedbenzylidene)cyclohexanones in good yields under milder conditions than those previouly reported.