Nucleophilic Attack by Oxyanions on a Phosphate Monoester Dianion: The Positive Effect of a Cationic General Acid
作者:Anthony J. Kirby、Marcelo F. Lima、Davi da Silva、Faruk Nome
DOI:10.1021/ja038428w
日期:2004.2.1
The two negative charges on a phosphate monoester RO-PO32- at neutral pH provide a considerable electrostatic barrier toward reactions with nucleophilic reagents with a negative charge on the attacking atom. Electrostatic repulsion disappears when the hydrolysis of an aryl phosphate monoester is catalyzed by a neighboring cationic general acid. The hydrolysis of 8-dimethylammonium-1-phosphate (1) is catalyzed by oxyanions, fluoride anion, and hydroxylamines at similar rates.