Hydroboration of Unsaturated Phosphonic Esters: Synthesis of Boronophosphonates and Trisubstituted Vinylphosphonates
作者:Inna Pergament、Morris Srebnik
DOI:10.1021/ol006836o
日期:2001.1.1
[figure: see text] Hydroboration of vinyl phosphonates with pinacolborane (PBH) proceeds to give phosphonoboronates, 2. Surprisingly, such compounds have not been reported before. The reaction works well with terminal alkenylphosphonates. Internal alkenylphosphonates give complex mixtures. Hydroboration/Suzuki coupling of alkynylphosphonates, with PBH, in a one-pot procedure gives trisubstituted vinylphosphonates
[图:见正文]用频哪醇硼烷(PBH)对膦酸乙烯基酯进行氢硼化可得到膦酰基硼酸酯2。令人惊讶的是,此类化合物以前尚未见报道。该反应与末端烯基膦酸酯一起很好地进行。内部链烯基膦酸酯产生复杂的混合物。单锅法将炔基膦酸酯与PBH进行硼氢化/铃木偶联,可得到具有良好总收率的三取代乙烯基膦酸酯,并提供了这些化合物的新合成方法。