作者:Franz Effenberger、Hariolf Kottmann
DOI:10.1016/s0040-4020(01)97192-3
日期:1985.1
anodic oxidation proceeds either via phosphinium radical cations, which then attack the arenes electrophilically, or via arene radical cations, which add the trialkylphosphite as nucleophile. Aryl phosphonates are also obtained in good yield by chemical oxidation with peroxodisulfate/AgNO3 in acetonitrile/water or glacial acetic acid. The diethylphosphinium radical cation, formed from diethylphosphite by
可以通过化学或阳极氧化由相应的芳烃和三或二烷基磷酸酯以高收率制备芳基膦酸酯。阳极氧化可通过基自由基阳离子进行,然后再以亲电子方式攻击芳烃,或通过芳烃基阳离子进行,后者将亚磷酸三烷基酯添加为亲核试剂。通过用过二硫酸盐/ AgNO 3在乙腈/水或冰醋酸中进行化学氧化,也可以以高收率获得芳基膦酸酯。由亚磷酸二乙酯通过用Ag(II)氧化而形成的二乙基phosph自由基阳离子被认为是该过程中的反应性物质。提高银盐浓度导致多膦酰化作用的增加。确定氧化膦酰化过程的选择性比。