1-Oxo-2-oxa-1-phosphabicyclo[2.2.2]octane: A New Mechanistic Probe for the Basic Hydrolysis of Phosphate Esters
作者:Andrzej E. Wróblewski、John G. Verkade
DOI:10.1021/ja9611147
日期:1996.1.1
title compound 2 was accomplished in a multistep sequence starting from hypophosphorous acid. In strong base, the bicyclic phosphinate 2 hydrolyzes 2 orders of magnitude faster than the bicyclic phosphate OP(OCH2)3CCH3 (1a) and the acceleration is entirely enthalpic. This rate enhancement is attributed to the greater ease with which 2 achieves the five-coordinate transition state. The molecular structure