Double Wittig reactions with 4-carboxybutylidene triphenylphosphorane as the key step in the synthesis of benzene derivatives metadisubstituted with ωω'-difunctionalized six-carbon chains

Article abstract of DOI:10.1016/0040-4039(96)00032-9

Using a double Wittig reaction from diformylbenzene derivatives, a direct synthetic way to 1,3-di(5-carboxypent-1-yl)benzene compounds is discussed.