作者:Claude Agami、François Couty、Nicolas Rabasso
DOI:10.1016/s0040-4039(02)00868-7
日期:2002.5
Substituted azetidinic 2-phosphonates were prepared in diastereoisomerically and enantiomerically pure form, starting from readily available β-amino alcohols. This synthesis involved a three-step sequence: (i) N-alkylation of the starting amino alcohol with a methylene phosphonate moiety, (ii) chlorination of the alcohol, and (iii) stereoselective 4-exo-tet ring closure through an intramolecular alkylation
从容易获得的β-氨基醇开始,以非对映异构和对映异构纯的形式制备取代的氮杂环丁烷2-膦酸酯。这种合成所涉及的三步骤顺序:(ⅰ)ñ与亚甲基膦酸酯部分的起始氨基醇的烷基化,(ii)所述醇的氯化,和(iii)立体选择性4-外- TET环合通过分子内烷基化锂化的氨基膦酸酯。