Abstract
Abstract ( η 4 -1,3-dienecarboxylic acid)Fe(CO) 3 complexes 1 were prepared, starting from a Horner-Emmons reaction of α,β-unsaturated aldehydes, followed by complexation with Fe(CO) 5 and hydrolysis of the ester groups. Reaction of 1 with ( S )-2-octanol gave a mixture of diastereomeric esters which can be easily separated by column chromatography. Enantiomerically pure ( η 4 -1,3-dienecarboxylic acid)Fe(CO) 3 complexes were obtained by hydrolysis of the esters thus separated without racemization and decomposition of the complexes.
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