Phenols oxycarbonylation

It has been reported that tertiary amines (as additives or as the solvent) lead to increased yields when etherifying tyrosine derivatives with polystyrene-bound benzyl alcohols [175]. Nevertheless, other phenols react smoothly without the addition of a base [47,176], When only a slight excess of phenol is used for the etherification of support-bound alcohols, AyV -bi s (eth oxycarbonyl)hydrazi n e (the by-product of the Mit-sunobu reaction) can compete with the phenol to a significant extent and become attached to the support. This reaction can be suppressed by the use of a greater excess of phenol [168]. 

The oxycarbonylation of phenol in the presence of a palladium catalyst, a tertiary amine and a manganese cocatalyst at room temperature and atmospheric pressure results in the formation of diphenyl carbonate in good yield (equation 184).453... 

Poly(ethyIene terephtiialate-co-c-caprolactone) Poly(oxyterephthaloyloxyethylene-ci>-oxycarbonyl- Phenol/tetrachloroethane (3/2) 318... 

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