Synthesis
The 2,15-hexadecanedione was prepared as follows: 2,2’-dodecamethylenebis(benzimidazole) salt (Ia), 2,2’-dodecamethylenebis(benzoxazole) salt (Ib), 2,2’-dodecamethylenebis(benzothiazole) salt (Ic), 2,2’-dodecamethylenebis(imidazolinium) salt (Id), 2,2’-dodecamethylenebis(oxazolinium) salt (Ie), or 2,2’-dodecamethylenebis(oxazolinium) salt ( Ic) in a solvent with methyl magnesium halide. Id), 2,2’-dodecamethylenebisoxazoline salt (Ie) or 2,2’-dodecamethylenebisthiazoline salt (If) were reacted, followed by acidic hydrolysis.
