| abstract |
It is an object of the present invention to provide a process for the preparation of 9,9-dialkoxy-7-nonenoate and (7E)-7,9-decadienoate, which are valuable as intermediates . The method for preparing (7E)-7,9-decadienoate (5) at least comprises the following steps: hydrolyzing 9,9-dialkoxy-7-nonenoate (2) R 3 O(R 2 O ) CHCH = CH( CH2 ) 5CO2R1 to form (7E)-9-oxo-7-nonenoic acid ester (3); and (7E)-9-oxo-7-nonenoic acid Ester (3) is subjected to a Wittig reaction with triarylphosphonium methylidene salt ( 4 ) Ar3P= CH2 to form (7E)-7,9-decadienoate (5). 9,9-Dialkoxy-7-nonenoate can be prepared, for example, by reducing 9,9-dialkoxy-7-nonenoate (1). |