Environmentally benign oxidation using a palladium catalyst system
2000
A clean and environmentally benign process to convert benzylic
and allylic alcohols into the corresponding carbonyl compounds using a
catalytic amount of palladium on activated charcoal under an ethylene
atmosphere is developed. The combination of Pd(OAc)2 and vinyl
acetate is an excellent system. The efficient conversion is based on
hydrogen transfer between allylic and benzylic alcohols and simple olefins
such as ethylene and vinyl acetate. In the oxidation of D-glucal
to the corresponding enone (1,5-anhydrohex-1-en-3-ulose), the palladium
catalyst is proven to be reused without a decrease of catalytic activity.
This extremely simple process is not only economically advantageous but it
is also environmentally friendly in comparison to conventional methods
using chromium or manganese salts.
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