Stereoselective synthesis of 1,4,2-oxazaphosphorines as precursors of chiral ?-aminophosphonic acids by intramolecular heterocyclization of ?-aldiminoalkylphosphites
作者:Mudaris N. Dimukhametov、Eugenija V. Bajandina、Elena Yu. Davydova、Igor A. Litvinov、Aidar T. Gubaidullin、Alexey B. Dobrynin、Tatyana A. Zyablikova、Vladimir A. Alfonsov
DOI:10.1002/hc.10054
日期:——
aminobutanol-1 being used as a precursor, nucleophilic attack by P(III) atom on electrophilic C atom of the CN group proceeds stereospecifically with participation of only re-face of the two possible diastereotopic faces of the imine double bond to give the epimeric at phosphorus (3R,5R)-2-(β-chloroethyl)-2-oxo-3-phenyl-5-ethyl-1,4,2-oxazaphosphorines as precursors of nonracemic α-aminophosphonic acids
以由氯亚磷酸酯和β-醛亚醇[N-(亚苄基)-2-氨基乙醇和R-(+)-N形成的β-醛亚氨基烷基亚磷酸酯为例,首次进行了亚磷酸酯与亚胺的亲核加成的分子内形式-(亚苄基)-2-氨基丁醇-1]。在这些反应中,以良好的收率获得了立体异构的 1,4,2-氧氮杂膦。R-(+)-N-(亚苄基)-2-氨基丁醇-1用作前体,P(III)原子对CN基团的亲电C原子的亲核攻击立体定向地进行,仅参与亚胺双键的两个可能的非对映体面以磷 (3R,5R)-2-(β-氯乙基)-2-oxo-3-phenyl-5-ethyl-1,4,2-oxazaphosphorines 作为前体提供差向异构体非外消旋 α-氨基膦酸。© 2003 Wiley Periodicals, Inc. 杂原子化学 14:56–61, 2003; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI