New Feature of Friedel-Crafts Phosphonation of Anisoles: Unexpected <i>In Situ</i> Methylphosphorylation Reaction
作者:Graziano Baccolini、Carla Boga
DOI:10.1055/s-1999-2706
日期:1999.6
Anisoles 1, reacting with AlCl3 and PCl3 with appropriate reagent ratios, give, in good yields, the corresponding diaryl methylphosphonates 2 or the methylphosphinates 3b,c and the methylphosphine oxides 4b,c. This unexpected in situ methylphosphorylation explains the reported limited and conflicting results to obtain methoxy-substituted arylphosphonous dichloride with the same reagents. A suggested mechanism is also reported.
苯甲醚1与AlCl3和PCl3以适当的试剂比反应,能够良好地生成相应的二芳基甲基膦酸酯2或甲基膦酸酯3b,c,以及甲基膦氧化物4b,c。这一意外的原位甲基膦酸化解释了使用相同试剂获得美克羟基取代的芳基膦酸二氯化物时报告的有限且相互冲突的结果。同时还报告了一个提出的机制。