Aa. Shvets et al., O-HYDROXYAROYLMETHYLTRIARYLPHOSPHONIUM(ARSONIUM) BROMIDES AND YDROXYAROYLMETHYLENETRIARYLPHOSPHORANES(ARSORANES), Russian journal of applied chemistry, 68(1), 1995, pp. 43-45
Preparation of o-hydroxyaroylmethyltriarylphosphonium(arsonium) bromid
es by reaction of substituted o-hydroxy-omega-bromoacetophenones with
triarylphosphines (arsines) and their subsequent conversion into ydrox
yaroylmethylenetriarylphosphoranes(arsoranes) on treatment with sodium
ethoxide are described. The possibility of prototropic and conformati
onal transformations of the resulting ylides is discussed on the basis
of H-1 NMR and IR spectra.