A process for the preparation of a compound of formula I:
##STR1##
- wherein R is a hydrogen or a C1-6 alkyl group which is straight
chain, branched or cyclic, with or without an oxygen, nitrogen or sulphur heteroatom
anywhere in the chain or ring by reacting
- a compound of formula II:
##STR2##
- with a source of hydrogen selected from either hydrogen or water in
the presence of a mixture of at least two catalysts selected from nickel, raney
nickel, and palladium, at a pH below 7.0 in a solvent medium comprising an alcohol
having a carbon chain length of up to 3.
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