Very Simple One-Step Synthesis of Vinylphosphonates and Enamine Phosphonates by Direct Addition of Organolithium Reagents to 1-Alkynylphosphonates
作者:Abdullatif Azab、Dorit Moradov、Abed Al-Aziz Al-Quntar、Morris Srebnik
DOI:10.1080/10426507.2012.655814
日期:2012.8.1
organolithium to 1-alkynylphosphonates (1) afforded vinylphosphonates and enamine phosphonates (2) in good to excellent yields. The reaction was carried out in dry THF at low temperature and proved to be completely stereoselective (syn addition). Alkyl, aryl, and haloalkyl groups were attached to the alkynyl entity, so the resulting vinylphosphonates contained various functional groups. The stereochemistry
摘要 将有机锂直接加成到 1-炔基膦酸酯 (1) 中可以得到乙烯基膦酸酯和烯胺膦酸酯 (2),收率良好至极好。该反应在低温干燥 THF 中进行,并证明是完全立体选择性的(同加成)。烷基、芳基和卤代烷基连接到炔基实体上,因此所得乙烯基膦酸酯包含各种官能团。基于1H和13C NMR确定产物的立体化学以及反应机理。在没有复杂的、非常昂贵的有机金属催化的情况下合成烯胺膦酸酯以前没有报道过。图形概要