An. Bovin et al., (2-HYDROXYPHENYLMETHYLENE)BIS(PHOSPHINE OXIDES) - A FACILE REARRANGEMENT INTO 2-(PHOSPHINYLMETHYL)PHENYL PHOSPHINATES, Journal of the Chemical Society, Chemical Communications, (8), 1994, pp. 973-974
(2-Hydroxyphenylmethylene)bis(phosphine oxides)3 prepared from 2-(diph
enylphosphinylmethyl)phenyl phosphinates 2 by oxygen-to-carbon 1,4-pho
sphinyl migration easily rearrange back into a mixture of 2-(phosphiny
lmethyl)phenyl phosphinates 2 and 4 under basic conditions or upon hea
ting.