cis- andtrans-2-(Isocyanomethyl)-5,5-dimethyl-2-oxo-4-phenyl-1,3,2-dioxaphosphorinane – Synthesis and Structure of the First Chiral Isocyanomethylphosphonate Synthons
作者:Jan-Willem Weener、Jos P. G. Versleijen、Auke Meetsma、Wolter ten Hoeve、Albert M. van Leusen
DOI:10.1002/(sici)1099-0690(199808)1998:8<1511::aid-ejoc1511>3.0.co;2-g
日期:1998.8
2-(formamidomethyl)oxo-1,3,2-dioxaphosphorinane 7, which upon dehydration gave 1a. Thus, both (±)-1a and (2S,4S)-(–)-1a were prepared, and their molecular structures were determined by single-crystal X-ray analysis. Treatment of (2S,4S)-(–)-1a with KF gave a 1:3 equilibrium mixture of the phosphorus epimers 1a and 1b, from which the predominant trans epimer (2S,4R)-(–)-1b was isolated by column chromatography and crystallization
cis-2-(isocyanomethyl)-5,5-二甲基-2-oxo-4-phenyl-1,3,2-dioxaphosphorinane (1a) 和反式差向异构体 1b 已被制备为潜在有用的手性异氰甲基膦酸酯合成子。2-甲氧基-1,3,2-二氧杂膦烷 5 和相应的 2-乙氧基类似物 6 由 2,2-二甲基-1-苯基-1,3-丙二醇 (2) 制备,并在 Arbuzov 型反应中转化到 2-(甲酰胺甲基)氧代-1,3,2-二氧杂膦烷 7,脱水后得到 1a。因此,制备了 (±)-1a 和 (2S,4S)-(-)-1a,并通过单晶 X 射线分析确定了它们的分子结构。用 KF 处理 (2S,4S)-(-)-1a 得到 1:3 的磷差向异构体 1a 和 1b 的平衡混合物,其中主要的反式差向异构体 (2S,4R)-(-)-1b 通过以下方法分离柱层析和结晶。