PHENOLIC COMPOUND AND ITS PREPARATION

NEW MATERIAL:Bis(3-allyl-4-hydroxyphenyl)sulfone of formula I . USE:A color developing agent for heat-sensitive or pressure-sensitive recording. A raw material of epoxy resin, polycarbonate resin, polyurethane, etc. A raw material of flame-retardant, curing agent, stabilizer, etc., and raw material of pigments, photographic chemicals, pharmaceuticals and agricultural chemicals, etc. PREPARATION:The compound of formula I can be produced by (1) reacting the compound of formula II (M is H or alkali metal) with the compound of formula III [X is halogen or RSO3 (R is phenyl or lower alkyl)] in the presence of a phase-transfer catalyst (preferably trioctyl methyl ammonium chloride, etc.) and an acid acceptor (e.g. sodium hydroxide), and (2) subjecting the reaction product to the rearrangement reaction at 170-230 deg.C in a solvent such as trichlorobenzene.