Nonquaternary cholinesterase reactivators. 2. .alpha.-Heteroaromatic aldoximes and thiohydroximates as reactivators of ethyl methylphosphonyl-acetylcholinesterase in vitro
作者:Richard A. Kenley、Clifford D. Bedford、Oliver D. Dailey、Robert A. Howd、Alexi Miller
DOI:10.1021/jm00375a021
日期:1984.9
alpha-heteroaromatic aldoximes, RC(= NOH)H, and thiohydroximates, RC(= NOH)S-(CH2)2N(C2H5)2, where R represents various oxadiazole and thiadiazole rings. Each compound was characterized with respect to the following: structure, (hydroxyimino)methyl acid dissociation constant, nucleophilicity toward trigonal carbon and tetrahedral phosphorus, octanol-buffer partition coefficient, reversible inhibition of eel acetylcholinesterase
我们准备了六对α-杂芳族醛肟(RC(= NOH)H和硫代氢肟酸酯RC(= NOH)S-(CH2)2N(C2H5)2,其中R代表各种恶二唑和噻二唑环。每种化合物的特征如下:结构,(羟基亚氨基)甲基解离常数,对三角碳和四面体磷的亲核性,辛醇-缓冲液分配系数,鳗e乙酰胆碱酯酶(AChE)的可逆性抑制以及被抑制的AChE的体外再活化由对硝基苯基甲基膦酸酯制得。十二种化合物中的八种可显着活化乙基甲基膦酰基-AChE,但固有反应性中等至低:最有效的非季铵化活化剂,3-苯基-5-[(羟基亚氨基)甲基] -1,2,4-恶二唑,与众所周知的活化剂2-[((羟基亚氨基)甲基] -1-甲基碘化碘化物(2-PAM))相比,它的活性低17倍。非季铵化合物之一,即3-苯基-1,2,4-恶二唑-5-硫代氢氧酸2-(二乙氨基)乙基S-酯,是AChE的强大可逆抑制剂(I50 = 7.5 microM)。非季化合物结构,活化