描述了一种不对称合成2 H -azirine-2-膦酸酯6的简单有效的方法。关键步骤是衍生自膦酸酯的对甲苯磺酰氧肟4的碱介导的Neber反应。使用三乙胺5,生物碱7和固相键合的非手性8或手性胺9。在乙醇中用硼氢化钠还原2 H -azirines 6得到顺式-氮丙啶膦酸酯10。氮丙啶10和11的开环导致对映体富集的β-12和14以及α-氨基膦酸酯13和15。
Asymmetric synthesis of aziridine 2-phosphonates and azirinyl phosphonates from enantiopure sulfinimines
摘要:
Enantiopure sulfinimine (S)-4 was employed in a Darzens-type synthesis of aziridine 2-phosphonates (-)-7/(+)-8 which were transformed into alpha-amino phosphonates (S)-11/(R)-12 and the first enantiopure examples of azirinyl phosphonates 13-15. (C) 1998 Elsevier Science Ltd. All rights reserved.