Synthesis and biological evaluation of new curcumin derivatives as antioxidant and antitumor agents
摘要:
Twenty-four new compounds were prepared, taking curcumin as a lead, in order to explore their antioxidant and antitumor properties. The capacities of these derivatives to scavenge the 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS(.+)), and to protect human red blood cells (RBCs) from oxidative haemolysis were investigated. In addition, the percentage viability of different cell lines (Hep G2, WI38, VERO and MCF-7) was tested. The result of the antitumor testing was generally in accordance with those of the antioxidant assays. Compounds which bear o-methoxy substitution to the 4-hydroxy function in the phenyl ring (7g, 5g and 3g) exhibited significantly higher ABTS(.+)-scavenging, antihaemolysis, and antitumor activities than other derivatives. In addition, molecular modelling studies were carried out for biologically active and inactive compounds, to study the structure-activity relationship, with the aim to elucidate which portions of the molecules are critical for the antioxidant and antitumor activity.
A novel synthetic route to phenyl-substituted pyridines synthesis of [1] benzopyrano[4,3-b]pyridines, [1]benzothiopyrano[4,3-b]bpyridines and pyrido[3,2-b][1,4]benzothiazines(1-azaphenothiazines)
作者:D.V. Tyndall、T. Al Nakib、M.J. Meegan
DOI:10.1016/0040-4039(88)85265-1
日期:——
4-diphenyl-2-methoxypyridine-3-carbonitrile. This reaction has been applied to a general synthesis of phenyl-substituted [1]benzopyrano[4,3-pyridines, [1]benzothiopyrano[4,3-]pyridines and pyrido[3,2- [1,4]benzothiazines(1-azaphenothiazines).
Clean, One‐Pot Synthesis of 4<i>H</i>‐Pyran Derivatives Catalyzed by Hexadecyltrimethyl Ammonium Bromide in Aqueous Media
作者:Tong‐Shou Jin、Li‐Bin Liu、Ying Zhao、Tong‐Shuang Li
DOI:10.1081/scc-200064898
日期:2005.7
Abstract An efficient and convenient synthetic route to 4H‐pyran derivatives in water in the presence of hexadecyltrimethyl ammonium bromide (HTMAB) as catalyst is described. This method provides several advantages such as environment friendliness, high yields, and a simple workup procedure. In addition, water was chosen as a green solvent.
Synthesis of 2‐Aminopyran Derivatives and 3‐Arylpropionitrile Derivatives Catalyzed by KF/Al<sub>2</sub>O<sub>3</sub>
作者:Xiang‐shan Wang、Da‐qing Shi、Ya Du、Yan Zhou、Shu‐jiang Tu
DOI:10.1081/scc-120030692
日期:2004.12.31
A series of 2-cyano-3-aryl-3-(3,4-dihydro-1(2H)-naphthalene-one-2-yl) propionitrile derivatives and 2-aminopyran derivatives were synthesized by the KF-Al2O3-catalyzed reaction of malononitrile with 2-arylmethylidene-3,4-dihydro-1(2H)-naphthalenone, 2,6-biarylmethylidene cyclohexanone, or 2,5-biarylmethylidene cyclopenanone in DMF at room temperature. The structure of the later was confirmed by x-ray analysis.
TYNDALL, D. V.;AL, NAKIB T.;MEEGAN, M. J., TETRAHEDRON LETT., 29,(1988) N 22, C. 2703-2706