A new synthesis of enantiomerically pure α- and β-amino acid derivatives using aziridinyl anions
作者:Tsuyoshi Satoh、Yuta Fukuda
DOI:10.1016/j.tet.2003.09.025
日期:2003.12
Optically active sulfinylaziridines having a 4-methoxyphenyl group on their nitrogen atom were synthesized from optically active 1-chloroalkyl p-tolyl sulfoxide and an imine derived from benzaldehyde and p-anisidine stereoselectively in good overall yields. The sulfinylaziridines were treated with ethylmagnesium bromide or tert-butyllithium to afford aziridinylmagnesiums or aziridinyllithiums, respectively
由光学活性的1-氯烷基对甲苯基亚砜和衍生自苯甲醛和对茴香胺的亚胺立体选择性地合成了在其氮原子上具有4-甲氧基苯基的光学活性的亚磺酰基氮丙啶。用亚乙基溴化镁或叔丁基处理亚磺酰基氮丙啶-丁基锂以定量收率分别得到叠氮基镁或叠氮基锂。在碘化铜(I)存在下,叠氮基烷基镁与碘代烷烃的交叉偶联以高收率得到三取代的氮丙啶,由此合成对映体纯的β,β-二取代的β-氨基酸衍生物。通过该方法,还实现了在立体中心具有氘的β-氨基酸衍生物。另一方面,从叠氮基锂上,合成对映体纯的季苯基丙氨酸和季天冬氨酸衍生物。