Nucleophilic substitution of (sulfonyloxymethyl)aziridines: an asymmetric synthesis of both isomers of mexiletine
作者:Sang-Mi Han、Sang-ho Ma、Hyun-Joon Ha、Won Koo Lee
DOI:10.1016/j.tet.2008.09.068
日期:2008.12
The nucleophilic substitution reactions of 1-[1′(R)-α-methylbenzyl]-(2R)- and (2S)-(sulfonyloxymethyl)aziridines were carried out with various nucleophiles including N3−, MeO−, CN−, SCN−, and diarylcuprates. The reaction pathway is influenced by the stereochemistry of the substrates, nucleophiles, and also the structure of the leaving groups. When the reaction site is less sterically hindered for the
1- [1'(的亲核取代反应- [R(2 - )-α甲基苄基] - [R )-和(2小号) - (磺酰氧基甲基)氮杂环丙烷用各种亲核包括N-进行3 - ,的MeO -,CN -,SCN -和diarylcuprates。反应途径受底物,亲核试剂的立体化学以及离去基团的结构影响。当反应位点在空间上受反应亲核试剂接近底物的影响较小时,1- [1'(R)-α-甲基苄基]-(2 S)-(p-甲苯磺酰氧基甲基)氮丙啶,以单一异构体的形式获得产物,而所有其他起始原料提供来自两种不同反应途径的两种异构体的混合物。该方法的应用使我们能够制备口服有效抗心律不齐药美西律的两种异构体。