Racemization and transesterification of alkyl hydrogeno-phenylphosphinates.

Abstract:

:In this article, we explore, both theoretically and experimentally, the general reactivity of alkyl hydrogeno-phenylphosphinates with alcohols. We show that alcohol molecules act exclusively as nucleophilic species, and add to alkyl hydrogeno-phenylphosphinates, leading to pentacoordinated intermediates. These intermediates are shown to subsequently competitively undergo alcohol eliminations and/or Berry pseudorotations. This offers several possible routes for racemizations and/or alcohol exchange reactions. Transition standard Gibbs free energies predicted from DFT calculations for the overall alcohol exchange mechanism are shown to be compatible with those experimentally measured in case ethanol reacts with ethyl hydrogeno-phenylphosphinate (134.5∼136.0 kJ mol-1 at 78 °C). Graphical abstract ᅟ.

journal_name

J Mol Model

authors

Javierre G,Fortrie R,Jean M,Moraleda D,Naubron JV,Fotiadu F

doi

10.1007/s00894-017-3343-7

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

168

issue

5

eissn

1610-2940

issn

0948-5023

pii

10.1007/s00894-017-3343-7

journal_volume

23

pub_type

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