Studies on aryl H-phosphonates. 3. Mechanistic investigations related to the disproportionation of diphenyl H-phosphonate under anhydrous basic conditions
anhydrous reaction conditions a base-promoted disproportionation to triphenylphosphite and phenyl H-phosphonate. On the basis of 31P NMR data the most likely mechanism for this transformation was proposed. In order to substantiate these findings and to get a deeper insight into the chemistry of aryl H-phosphonate esters, we carried out also some studies on activation of phenyl and diphenyl H-phosphonates
H-膦酸二苯酯在无水反应条件下发生碱促进的歧化成亚磷酸三苯酯和H-膦酸苯酯。根据31 P NMR数据,提出了这种转化的最可能机理。为了证实这些发现并更深入地了解芳基H-膦酸酯的化学性质,我们还进行了一些有关用各种缩合剂活化苯基和二苯基H-膦酸酯的研究。我们发现,膦酸的芳基对烷基酯通常在活化过程中遵循不同的反应途径,这很可能可以追溯到磷中心的较高亲电性和芳基H-膦酸酯衍生物中PH键的较高反应性。