Cyclic five-membered phosphinate esters as transition state analogues for obtaining phosphohydrolase antibodies
作者:Gabriel Hum、Krista Wooler、Jeremy Lee、Scott D Taylor
DOI:10.1139/v00-068
日期:2000.5.1
Two novel cyclic five-membered phosphinate esters (6 and 7) were synthesized and used as transition state analogues (TSAs) for raising phosphohydrolase antibodies. The key step in the syntheses was a McCormack reaction between (2-chloroethyl)dichlorophosphite and 1,4-diphenyl-1,3-butadiene to form isomeric cyclic phosphinyl chlorides which upon further elaboration yielded the TSAs. X-ray crystal structures
合成了两种新型环状五元次膦酸酯(6 和 7),并将其用作过渡态类似物 (TSA) 以提高磷酸水解酶抗体。合成中的关键步骤是(2-氯乙基)二氯亚磷酸酯和 1,4-二苯基-1,3-丁二烯之间的 McCormack 反应,形成异构的环状膦酰氯,在进一步加工后产生 TSA。两种环状次膦酸盐 TSA 前体(14a 和 14b)的 X 射线晶体结构显示高度压缩的 CPC 键角为 94°-97°,表明 6 和 7 中的 CPC 键角向理想的三角双锥体赤道顶点转变显着扭曲磷酸酯水解过程中形成90°的状态角。使用标准杂交瘤技术将抗体提高到 6 和 7。一种抗体,Jel 541,一种 IgM 类抗体,