Studies on the novel α-glucosidase inhibitory activity and structure–activity relationships for andrographolide analogues
作者:Gui-Fu Dai、Hai-Wei Xu、Jun-Feng Wang、Feng-Wu Liu、Hong-Min Liu
DOI:10.1016/j.bmcl.2006.02.011
日期:2006.5
A series of analogues of andrographolide were synthesized and evaluated as novel alpha-glucosidase inhibitors. Among them compound 23, 15-p-methoxylbenzylidene 14-deoxy-11, 12-didehydroandrographolide, was a potent inhibitor against alpha-glucosidase Whose IC50 value was 16 mu M. The structure-activity relationships were also discussed. (C) 2006 Elsevier Ltd. All rights reserved.
Synthesis of andrographolide derivatives: A new family of α-glucosidase inhibitors
作者:Hai-Wei Xu、Gui-Fu Dai、Gai-Zhi Liu、Jun-Feng Wang、Hong-Min Liu
DOI:10.1016/j.bmc.2007.03.063
日期:2007.6
Andrographolide (1), the cytotoxic agent of the plant Andrographis paniculata, was subjected to semi-synthetic studies leading to a series of new derivatives, a novel family of glucosidase inhibitors. Nicotination of 3,19-hydroxyls in 15-alkylidene andrographolide derivatives (9) was favorable to alpha-glucosidase inhibition activity. Among them, 15-p-chlorobenzylidene-14-deoxy-11,12-didehydro-3,19-dinicotinateandrographolide (11c) was a very potent inhibitor against alpha-glucosidase with an IC50 value of 6 mu M. However, all compounds concerned for beta-glucosidase showed no inhibition. All compounds synthesized were characterized by the analysis of NMR, IR, HRMS spectra and the stereochemistry of 2 was confirmed by X-ray analysis. (C) 2007 Published by Elsevier Ltd.
Camphor sulphonic acid mediated quantitative 1,3–diol protection of major Labdane diterpenes isolated from <i>Andrographis paniculata</i>
作者:Venu Sharma、Kamal K. Kapoor、Debaraj Mukherjee、Vivek K. Gupta、Manoj K. Dhar、Sanjana Kaul
DOI:10.1080/14786419.2017.1402313
日期:2018.8.3
Phytochemical survey of the methanol extract of the dried aerial parts of Andrographis paniculata led to the isolation of major labdane diterpenes, namely 14-deoxy-11,12-didehydroandrographolide, andrographolide and neoandrographolide. Andrographolide was found to be the major phytoconstituent of the plant which was biologically active. For better physiochemical characteristics and bioefficacy, andrographolide