Bisphenol A → 4,4'-{Isopropylidenediphenol} octylphosphite

Participants

Reaction Steps

In a round bottom flask, 34.6 g (0.1 mol) of diphenyl-(2-ethylhexyl)phosphite, 22.8 g (0.1 mol) of bisphenol-A, and a catalytic quantity of metallic sodium (or alcoholate of an alkali metal) was heated at 180° C. under an atmosphere of nitrogen for one hour. The temperature was reduced to 90-100° C. The phenol was then removed under vacuum (10 mm) over 2.5 hours. When the residual pressure dropped to 1 mm, the reaction mass was subjected to vacuum for two more hours. The yield was quantitative. The phosphorus-31 NMR showed a series of peaks from 126 to 131 ppm.

Provenance & Evidence