Asymmetric synthesis of cyclic α-amino acid derivatives by the intramolecular reaction of magnesium carbenoid with an N-magnesio arylamine
作者:Shintaro Mitsunaga、Tohru Ohbayashi、Shimpei Sugiyama、Takahito Saitou、Makoto Tadokoro、Tsuyoshi Satoh
DOI:10.1016/j.tetasy.2009.06.024
日期:2009.7
The synthesis of pipecolic acid and homopipecolic acid derivatives was developed from ω-(2-aminophenyl)-1-chloroalkyl p-tolyl sulfoxides by treatment with i-PrMgCl. An intramolecular nucleophilic substitution reaction of a magnesium carbenoid with an N-magnesio arylamine is the key step of this reaction. Proline and pipecolic acid derivatives were also synthesized from ω-(arylamino)-1-chloroalkyl p-tolyl
通过用i- PrMgCl处理,从ω-(2-氨基苯基)-1-氯烷基对甲苯基亚砜开发了胡椒酸和高哌酸衍生物的合成方法。羧甲基镁与N-镁芳基胺的分子内亲核取代反应是该反应的关键步骤。脯氨酸和胡椒酸衍生物也由ω-(芳基氨基)-1-氯烷基对甲苯基亚砜通过相同的化学方法合成。从对映体纯的(1 S,R S)-1-氯-3- [2-(N-甲基氨基)苯基]丙基对甲苯基亚砜开始,对映体纯的(R获得了)-哌酸衍生物。事实证明,类胡萝卜素镁与N-镁芳基胺的分子内亲核取代反应是通过类胡萝卜素碳的转化而发生的。还讨论了这些反应的立体化学。