Design, synthesis and structure–activity relationships of some novel, highly potent anti-invasive (E)- and (Z)-stilbenes
摘要:
In our ongoing exploration of the structure-activity landscape of anti-invasive chalcones, we have prepared and evaluated a number of structurally related (E)- and (Z)-stilbenes. These molecules exhibited an extraordinary high in vitro potency in the chick heart invasion assay, being active up to 10 nmol L-1, a concentration level a 100-fold lower than the lowest effective doses that have been reported for natural analogues. Furthermore, they possess an interesting pharmacological profile in silico. (C) 2013 Elsevier Ltd. All rights reserved.
Various biologically important quinoxalines were efficiently synthesized in excellent yields via one-pot reaction between 1,2-diaminobenzenes and internal alkynes. The method utilizes inexpensive and readily available hypervalent iodine source, such as (diacetoxyiodo)benzene (PhI(OAc)(2)) and proved to be a better alternative as compared to expensive transition metal catalysts. Quinoxaline 4i [(2-phenyl-3-(3,4,5-trimethoxy phenyl)quinoxaline)] was evaluated for leukemia cancer cell lines and turned out to be a good candidate. (C) 2013 Elsevier Ltd. All rights reserved.