Change in the Mode of Inhibition of Acetylcholinesterase by (4-Nitrophenyl)sulfonoxyl Derivatives of Conformationally Constrained Choline Analogues
作者:Prashant S. Savle、Rohit A. Medhekar、Ella L. Kelley、Jerome G. May、Steven F. Watkins、Frank R. Fronczek、Daniel M. Quinn、Richard D. Gandour
DOI:10.1021/tx970019o
日期:1998.1.1
inhibitors of AChE, with values of Ki = 360 +/- 30 microM for (S)-2, 650 +/- 90 microM for (R)-2, 450 +/- 70 microM for (S)-4, and 560 +/- 30 microM for (R)-4, respectively. Enantiomers of 3 are noncompetitive inhibitors of AChE with values of Ki = 19.0 +/- 0.9 microM for (S)-3 and 50 +/- 2 microM for (R)-3, respectively. AChE shows a 2-fold chiral discrimination in the case of inhibition by 2 and 3. Inhibition
由(R)-和(S)-2-甲基糖醇手性五步合成2-(羟甲基)-2,4-二甲基吗啉(12),总产率为63%。将吗啉(R)-和(S)-12通过2,4-二甲基-2-[[[(4-硝基苯基)磺氧基]甲基]吗啉转化为2-(叠氮基甲基)-2,4-二甲基吗啉(15) 14)。将叔吗啉12、14和15季铵化,得到2-(羟甲基)-2,4,4-三甲基吗啉碘(2),2,4,4-三甲基-2-[[((4-硝基苯基)磺氧基])碘化甲基]吗啉鎓(3)和碘化2-(叠氮甲基)-2,4,4-三甲基吗啉鎓(4),它们均抑制乙酰胆碱酯酶(AChE)。将这些吗啉鎓抑制剂与构象受限的芳基半胱氨酸鎓AChE抑制剂进行了比较。2和4的对映异构体是AChE的可逆竞争性抑制剂,(S)-2的Ki = 360 +/- 30 microM,(R)-2的650 +/- 90 microM,(S)-4的450 +/- 70 microM,560 +/- 30