Nonquaternary cholinesterase reactivators. 4. Dialkylaminoalkyl thioesters of .alpha.-keto thiohydroximic acids as reactivators of ethyl methylphosphonyl- and 1,2,2-trimethylpropyl methylphosphonyl-acetylcholinesterase in vitro
作者:Clifford D. Bedford、Michiko Miura、Jeffrey C. Bottaro、Robert A. Howd、Harold W. Nolen
DOI:10.1021/jm00159a021
日期:1986.9
acetylcholinesterase (AChE) antidotes, a series of alpha-keto thiohydroximates were prepared and evaluated for their ability to reactivate AChEs inhibited by ethyl p-nitrophenyl methylphosphonate (EPMP) and soman (GD). The compounds conformed to the general structure 4-RC6H5C-(O)C(NOH)S(CH2)nN+R'R''.X- where R = H, CH3, F, Br, Cl, OCH3, CN;R' = CH3, C2H5, i-C3H7; R'' = H, CH3; X = Cl, I; and n = 2, 3. In this
在寻找改善的亲脂性中央活性乙酰胆碱酯酶(AChE)解毒剂的过程中,制备了一系列α-酮硫代氢肟酸盐,并评估了它们重新激活对硝基苯基甲基膦酸乙酯(EPMP)和梭曼(GD)抑制的AChE的能力。化合物符合一般结构4-RC6H5C-(O)C(NOH)S(CH2)nN + R'R''。X-,其中R = H,CH3,F,Br,Cl,OCH3,CN; R '= CH3,C2H5,i-C3H7; R''= H,CH3; X = Cl,I;n = 2,3。在该系列中,芳环上的多个R取代基产生的肟的pKa值为6.8至8.0,是AChE活化剂的最佳化合物。胺区段的亲脂性增加与活化剂效力相关,芳基部分上的吸电子基团也是如此,这可能是由于与AChE活性位点周围疏水位点的结合增加所致。对于GD抑制的AChE,α-酮硫代氢氧酸酯的体外再活化能力接近甚至超过了2-PAM和毒素。这些初步发现指出了额外的结构活性关系,以帮助设计改进的解毒剂化合物。