group exhibited the strongest ARE inductive activity in the first round structure–activity relationship (SAR) study. Biological studies showed the compound induced nuclear translocation of Nrf2 preceded by phosphorylation of ERK1/2. The data encouraged us to use 2 as lead and 20 derivatives were synthesized to discuss a more detailed SAR, leading to a more potent compound 9, which can be the starting
(R = quinoleine–8–; indole–3–; pyrrol–2– and 4–(dimethylamino)phenyl – afforded four new chalcone ligands (4–hydroxy–6–methyl–3–[(2 E )–3–quinolin–8–ylprop–2–enoyl]–2H–pyran–2–one) L1 , (4–hydroxy–3–[(2 E )–3–(1H–indol–3–yl)prop–2–enoyl]–6–methyl–2H–pyran–2–one) L2 , (4–hydroxy–6–methyl–3–[(2 E )–3–(1H–pyrrol–2–yl)prop–2–enoyl]–2H–pyran-2-one) L3 , and (3–(2E)–3–[4–(dimethylamino)phenyl]prop–2–enoyl}–4–hydroxy–6–m
N–H ... O 和 C–H ... O 氢键分别在 L3 和 L4 结构中观察到。检测了四种化合物 L1、L2、L3 和 L4 的原位生成的铜 (II) 配合物的催化活性,发现它们在大气分子氧下催化邻苯二酚到邻醌的氧化反应。这种氧化的速率取决于三个参数:配体、离子盐和溶剂性质,L2 [Cu (CH 3 COO) 2 ] 的组合导致更快的催化过程。