20240-58-8Relevant articles and documents
Facile synthesis of vanillin-based novel bischalcones identifies one that induces apoptosis and displays synergy with Artemisinin in killing chloroquine resistant Plasmodium falciparum
Sharma, Upendra K.,Mohanakrishnan, Dinesh,Sharma, Nandini,Equbal, Danish,Sahal, Dinkar,Sinha, Arun K.
, p. 623 - 638 (2018)
The inherent affinity of natural compounds for biological receptors has been comprehensively exploited with great success for the development of many drugs, including antimalarials. Here the natural flavoring compound vanillin has been used as an economical precursor for the synthesis of a series of novel bischalcones whose in vitro antiplasmodial activities have been evaluated against erythrocytic stages of Plasmodium falciparum. Bischalcones 9, 11 and 13 showed promising antiplasmodial activity {Chloroquine (CQ) sensitive Pf3D7 IC50 (μM): 2.0, 1.5 and 2.5 respectively}but only 13 displayed potent activities also against CQ resistant PfDd2 and PfIndo strains exhibiting resistance indices of 1.4 and 1.5 respectively. IC90 (8 μM) of 13 showed killing activity against ring, trophozoite and schizont stages. Further, 13 initiated the cascade of reactions that culminates in programmed cell death of parasites including translocation of phosphatidylserine from inner to outer membrane leaflet, loss of mitochondrial membrane potential, activation of caspase like enzyme, DNA fragmentation and chromatin condensation. The combinations of 13 + Artemisinin (ART) exhibited strong synergy (ΣFIC50:0.46 to 0.58) while 13 + CQ exhibited mild synergy (ΣFIC50: 0.7 to 0.98) to mild antagonism (ΣFIC50: 1.08 to 1.23) against PfIndo. In contrast, both combinations showed marked antagonism against Pf3D7(ΣFIC50: 1.33 to 3.34). These features of apoptosis and strong synergy with Artemisinin suggest that bischalcones possess promising antimalarial drug-like properties and may also act as a good partner drugs for artemisinin based combination therapies (ACTs) against Chloroquine resistant P. falciparum.
Synthesis and hypolipidemic and antiplatelet activities of α-asarone isomers in humans (in vitro), mice (in vivo), and rats (in vivo)
Poplawski,Lozowicka,Dubis,Lachowska,Witkowski,Siluk,Petrusewicz,Kaliszan,Cybulski,Strzalkowska,Chilmonczyk
, p. 3671 - 3676 (2000)
A series of α-asarone isomers was synthesized and investigated for their hypolipidemic and antiplatelet activity. Considering the hypolipidemic activity in rats at a dose of 80 mg/kg/day, some isomers were more potent than clofibrate at 150 mg/kg. Compoun
Novel curcumin analogue, preparation method and application thereof
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, (2019/10/01)
The invention relates to a novel curcumin analogue. The analogue is obtained by modifying curcumin with a substituent common in natural products. Specifically, the general structural formula of the analogue is shown as the specification, wherein R1 and R2
A combined RCM-Bischler-Napieralski strategy towards the synthesis of the carbon skeleton of excentricine and related stephaoxocanes
Larghi, Enrique L.,Kaufman, Teodoro S.
experimental part, p. 9921 - 9927 (2009/04/11)
A convenient synthetic approach to a cyclodeca[ij]isoquinoline derivative, which embodies the carbon skeleton of excentricine and related stephaoxocanes, is described. The synthesis involves the combined use of ring closing metathesis and Bischler-Napiera