Novel organophosphorus scaffolds of urease inhibitors obtained by substitution of Morita-Baylis-Hillman adducts with phosphorus nucleophiles
作者:Vassilis Ntatsopoulos、Stamatia Vassiliou、Katarzyna Macegoniuk、Łukasz Berlicki、Artur Mucha
DOI:10.1016/j.ejmech.2017.03.070
日期:2017.6
The reactivity of Morita-Baylis-Hillman allyl acetates was employed to introduce phosphorus-containing functionalities to the side chain of the cinnamic acid conjugated system by nucleophilic displacement. The proximity of two acidic groups, the carboxylate and phosphonate/phosphinate groups, was necessary to form interactions in the active site of urease by recently described inhibitor frameworks
利用Morita-Baylis-Hillman乙酸烯丙酯的反应性,通过亲核取代将含磷官能团引入肉桂酸共轭体系的侧链。通过最近描述的抑制剂框架,两个酸性基团(羧酸根和膦酸酯/次膦酸酯基)的接近对于在脲酶的活性位点形成相互作用是必需的。获得了几种有机磷支架,并筛选了抑制细菌尿素酶的方法,尿素酶是尿液和胃肠道病原体存活所必需的一种酶。α-取代的膦酰基甲基-肉桂酸酯和2-膦酰基乙基-肉桂酸酯似乎是最有效的并且已被进一步优化。结果,确定了脲酶最有效的有机磷抑制剂之一,α-膦酰基甲基-对甲基肉桂酸,Ki = 0。6μM的巴氏芽孢杆菌尿素酶。通过这种结构可以实现与酶活性位点的高度互补,因为任何进一步的修饰都会大大降低其亲和力。最后,这项工作描述了开发脲酶配体所面临的挑战。