Synthesis of Amide and Ester Derivatives of Cinnamic Acid and Its Analogs: Evaluation of Their Free Radical Scavenging and Monoamine Oxidase and Cholinesterase Inhibitory Activities
and selective MAO-B inhibitory activity. Compound 20 was the most potent inhibitor of MAO-B. Compounds 18 and 21 showed moderate BChE inhibitory activity. In addition, compound 18 showed potent antioxidant activity and MAO-B inhibitory activity. In a comparison of the cinnamic acid amides and esters, the amides exhibited more potent DPPH free radicalscavengingactivity, while the esters showed stronger
15 phenolic amides (PAs) have been synthesized and examinedin vitrousing four tests: (1) prevention of Cu2+-induced human low-density lipoprotein oxidation, (2) scavenging of stable radicals, (3) anti-inflammatory activity, and (4) scavenging of superoxide radicals.
Cinnamic acid amides from Tribulus terrestris displaying uncompetitive α-glucosidase inhibition
作者:Yeong Hun Song、Dae Wook Kim、Marcus J. Curtis-Long、Chanin Park、Minky Son、Jeong Yoon Kim、Heung Joo Yuk、Keun Woo Lee、Ki Hun Park
DOI:10.1016/j.ejmech.2016.02.044
日期:2016.5
active ingredients are unknown. This study attempted to isolate the responsible metabolites and elucidate their inhibition mechanism of α-glucosidase. By fractionating T. terristris extracts, three cinnamicacid amide derivatives (1–3) were ascertained to be active components against α-glucosidase. The lead structure, N-trans-coumaroyltyramine 1, showed significant inhibition of α-glucosidase (IC50 = 0
reported藜提取物具有抑制α-葡萄糖苷酶的潜力,但至今尚无有效成分的信息。这项研究试图分离负责的代谢产物,并阐明其对α-葡萄糖苷酶的抑制机制。通过分馏T. terristris提取物,三肉桂酸酰胺衍生物(1 - 3)中确定具有对抗α葡糖苷酶的活性组分。引线结构,ñ -反式-coumaroyltyramine 1,表明α葡萄糖苷酶的抑制显著(IC 50 = 0.42μM)。此外,所有活性化合物均显示出非竞争性的抑制机制,很少有关于α-葡萄糖苷酶抑制剂的报道。通过显示K m和V max以及K ik / K iv之比在1.029至1.053之间的降低,充分证明了该动力学行为。我们进行了研究,以研究如何对铅结构进行化学修饰1可能会影响抑制。肉桂酸酰胺的A环中的α,β-不饱和羰基和羟基已成为抑制α-葡糖苷酶的关键功能。分子模型研究表明,抑制活性与酶和抑制剂之间的π-π相互作用以及氢键相互作用密切相关。