Enantioenriched N-(2-chloroalkyl)-3-acetoxypiperidines as potential cholinotoxic agents. Synthesis and preliminary evidence for spirocyclic aziridinium formation
作者:Nam Huh、Charles M. Thompson
DOI:10.1016/0040-4020(95)00285-g
日期:1995.5
The syntheses of six enantioenriched analogs representing cyclic forms of acetylcholine are reported. (S)- and (R)-N-(2-chloroethyl)-3-acetoxypiperidine and (R,R)-, (R,S)-, (S,R)-, and (S,S)-N-(2-chloropropyl)-3-acetoxypiperidine have been synthesized from (R)- or (S)-3-hydroxypiperidine in five steps. (R)- and (S)-3-hydroxypiperidine were accessed via parallel stereospecific routes from d- and 1-glutamic
报道了代表乙酰胆碱的环状形式的六个对映体富集的类似物的合成。(S)-和(R)-N-(2-氯乙基)-3-乙酰氧基哌啶和(R,R)-,(R,S)-,(S,R)-和(S,S)-N从(R)-或(S)-3-羟基哌啶经五步合成了-(2-氯丙基)-3-乙酰氧基哌啶。(R)-和(S)-3-羟基哌啶可通过平行的立体定向途径从d-和1-谷氨酸进入,并通过非对映异构的tartranilic酸盐的分级重结晶而获得。((S)-N-(2-氯乙基)-3-乙酰氧基哌啶与高氯酸银反应形成乙酰胆碱的螺环叠氮基类似物,这是由叠氮基亚甲基的特征性1 H NMR位移所证明的。