Oroxylin A analogs exhibited strong inhibitory activities against iNOS-mediated nitric oxide (NO) production
摘要:
A number of oroxylin A analogs were prepared and evaluated for their inhibitory activities against iNOS-mediated nitric oxide (NO) production from LPS-stimulated BV2 cells. The analogs were synthesized from purchased 2'-hydroxy-4,5,6-trimethoxyacetophenone and aldehydes in 3 steps. Among the tested compounds, several analogs (3b, 3c, 3d, 3f) exhibited strong inhibitory activities. Especially, the analog with 4-nitrophenyl group (3b) showed stronger inhibitory activity (IC50 = 4.73 mu M) than that of wogonin (IC50 = 7.80 mu M). (C) 2012 Published by Elsevier Ltd.
Synthesis and Anticancer Activities of 5,6,7-Trimethylbaicalein Derivatives
作者:Hua-Lin Liao、Ming-Kuan Hu
DOI:10.1248/cpb.52.1162
日期:——
The aim of this study was to develop potential anticancer agents based on a naturally occurring baicalein, a flavonoid from Scatellariae radix. Cinnamic acid derivatives were converted to corresponding chlorides and then condensed with 3,4,5-trimethoxyphenol in the presence of BF3·Et2O to give chalcones. Intramolecular cyclization of these intermediates by the actions of DMSO/I2 afforded the desired trimethylbaicalein derivatives. Cell viability after treatment with the tested compound for 2 d was determined by a colorimetric MTT assay. The results indicated that most of the derivatives showed improved inhibition of proliferation of Hep G2 cells. Compound 9 was the most potent, in which the cell viability was reduced to <2% at the 25 μM level. In the case of Hep 3B cells, 8a, 8b and 8f showed moderate inhibition of their proliferation and 25 μM was required to reduce the viability to ca. 30%. On the other hand, prostate DU145 cells were more resistant. Most of the derivatives caused a 60% inhibition of DU145 cells only at a concentration of 100 μM or above.
Chromones and chromone derivatives and uses thereof
申请人:Yen Mao-Hsiung
公开号:US20060142211A1
公开(公告)日:2006-06-29
The present invention relates to chromones, novel chromone derivatives, and pharmaceutical formulations containing the same and methods of use thereof. Uses of the present invention include, but are not limited to, use for the prevention and treatment of septic shock, organ injury and other disorders. The compounds described herein can be salt forms and also water-soluble compounds.