Synthesis and in vitro antimalarial activity of tetraoxane-amine/amide conjugates
作者:Nitin Kumar、Shabana I. Khan、Himanshu Atheaya、Ritu Mamgain、Diwan S. Rawat
DOI:10.1016/j.ejmech.2011.04.002
日期:2011.7
A series of tetraoxanes, tetraoxane-amine and tetraoxane-amide conjugates have been synthesized and screened for in vitro antimalarial activity against chloroquine-sensitive and chloroquine-resistant strains of Plasmodium falciparum. Most of the conjugates showed slightly better antimalarial activity than the parent tetraoxanes. Three of the conjugate compounds were potentially active with IC(50) values in the range of 0.38-0.80 mu M. Cytotoxicity of four selected compounds was also evaluated in a panel of four cancer (SK-MEL, KB, BT-549, SK-OV-3) and two non-cancer (Vero and LLC-PK(11)) cell lines up to a concentration of 25 mu M and none of the compounds was found toxic to any of the cells. (C) 2011 Elsevier Masson SAS. All rights reserved.
Iodine-catalyzed one-pot synthesis and antimalarial activity evaluation of symmetrically and asymmetrically substituted 3,6-diphenyl[1,2,4,5]tetraoxanes
作者:Nitin Kumar、Shabana I. Khan、Mukul Sharma、Himanshu Atheaya、Diwan S. Rawat
DOI:10.1016/j.bmcl.2009.01.103
日期:2009.3
A novel iodine-catalyzed one-pot synthesis of symmetrically and asymmetrically substituted 3,6-diphenyl[1,2,4,5] tetraoxanes is described. The synthetic protocol is general with substituted benzaldehydes and proceeds well under acidic conditions. Total 17 tetraoxanes have been prepared during this study and some of these compounds exhibit promising antimalarial activity. None of the compounds shows any toxicity against vero cells. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis, antimalarial activity and cytotoxicity of substituted 3,6-diphenyl-[1,2,4,5]tetraoxanes
作者:Nitin Kumar、Shabana I. Khan、Beena、G. Rajalakshmi、P. Kumaradhas、Diwan S. Rawat
DOI:10.1016/j.bmc.2009.06.020
日期:2009.8
Substituted tetraoxanes with different substitution pattern on the aromatic ring were synthesized in order to explore the influence of different substituents in the antimalarial activity. Antimalarial activity of these compounds improves by the introduction of ethyl, iso-propyl or n-propyl groups in the aromatic ring but substitution with n-butyl or t-butyl leads decrease in antimalarial activity.