Enantioselective Inhibition of Microbial Lipolytic Enzymes by Nonracemic Monocyclic Enolphosphonate Analogues of Cyclophostin
作者:Vanessa Point、Raj K. Malla、Frederic Carrière、Stéphane Canaan、Christopher D. Spilling、Jean-François Cavalier
DOI:10.1021/jm4000787
日期:2013.6.13
Four nonracemic enolphosphonate analogues of Cyclophostin were obtained by asymmetric synthesis, and their absolute configurations at both phosphorus and C-5 carbon chiral centers were unambiguously assigned. The influence of chirality was studied by testing the inhibitory effects of these four stereoisomers toward the lipolytic activity of three microbial lipases: Fusarium solani cutinase, Rv0183
通过不对称合成获得了四个非外消旋的环磷酰胺的烯醇膦酸酯类似物,并明确分配了它们在磷和C-5碳手性中心的绝对构型。通过测试这四种立体异构体对三种微生物脂肪酶(镰孢镰刀菌角质酶,Rv0183和来自结核分枝杆菌的LipY)的脂解活性的抑制作用,研究了手性的影响。角质酶对使用(S c)抑制剂的(S p)构型具有很高的非对映选择性,而(R c)化合物。相反,Rv0183对(S p)构型表现出很强的对映选择性,而与不对称碳原子上的手性无关。最后,LipY仅区分出异常的非对映异构构型(R c,R p),从而产生最有效的抑制剂。这项工作为理解非外消旋烯醇膦酸酯及其抑制活性之间的立体选择性关系提供了基本前提,也为高特异性对映选择性抗菌剂的设计和合成开辟了新的前景。