Gram-scale synthesis of anti-pancreatic flavonoids (±)-8-[1-(4′-hydroxy-3′-methoxyphenyl)prop-2-en-1-yl]-chrysin and -galangin
摘要:
Gram-scale total synthesis of (+/-)-8-[1-(4'-hydroxy-3'-methoxyphenyl)prop-2-en-1-yl]-galangin (1) and -chrysin (2) has been accomplished in eight steps from commercially available phloroglucinol and three steps from commercially available chrysin, respectively, featuring an efficient introduction of C(8) (1-prop-2-en-1-yl)phenyl moiety in the natural products through chemo- and regioselective cinnamylation and regioselective aromatic Claisen rearrangement. (C) 2014 Elsevier Ltd. All rights reserved.
Gram-scale synthesis of anti-pancreatic flavonoids (±)-8-[1-(4′-hydroxy-3′-methoxyphenyl)prop-2-en-1-yl]-chrysin and -galangin
摘要:
Gram-scale total synthesis of (+/-)-8-[1-(4'-hydroxy-3'-methoxyphenyl)prop-2-en-1-yl]-galangin (1) and -chrysin (2) has been accomplished in eight steps from commercially available phloroglucinol and three steps from commercially available chrysin, respectively, featuring an efficient introduction of C(8) (1-prop-2-en-1-yl)phenyl moiety in the natural products through chemo- and regioselective cinnamylation and regioselective aromatic Claisen rearrangement. (C) 2014 Elsevier Ltd. All rights reserved.
Upregulation of both heme oxygenase-1 and ATPase inhibitory factor 1 renders tumoricidal activity by synthetic flavonoids via depleting cellular ATP
作者:Phil Jun Lee、Iljin Shin、Seung-Yong Seo、Hyoungsu Kim、Hong Pyo Kim
DOI:10.1016/j.bmcl.2014.08.055
日期:2014.10
Heme oxygenase-1 (HO-1) and ATPase inhibitory factor (ATPIF) 1 is often overexpressed in different types of cancer cells. Chrysin is a naturally-occurring flavonoid with antioxidant potentials, but also known to promote apoptosis. We have synthesized four chrysin derivatives and found compounds 1 and 4 remarkably upregulated the expression of HO-1, a cytoprotective enzyme. A robust expression of ATPIF1 was only seen in compound 4. Upregulation of both proteins triggers cell death in hydrogen peroxide-primed cells. Ten derivatives of compound 4 were synthesized and measured the expression of HO-1 and ATPIF1. Again, upregulation of both proteins by compound 8 killed the cells via apoptosis. To gain a physiological significance, we treated the synthetic flavonoids in colon cancer cells, HT29 and HCT116 cells and confirmed that overexpression of both HO-1 and ATPIF1 was critical for tumor cell death with an impaired mitochondrial energetics. It would provide a strategy for developing selective anti-tumor candidates. (C) 2014 Elsevier Ltd. All rights reserved.