O. Kintzel et al., SYNTHESIS OF MODEL COMPOUNDS FOR THE STRUCTURE ELUCIDATION OF A LADDER POLYMER FROM BENZO[1,2-C-4,5-C']DIFURAN AND A DIQUINONE DERIVATIVE, Journal of organic chemistry, 61(21), 1996, pp. 7304-7308
The high yield synthesis of the fully soluble acenequinone model compo
unds 6 and 7 as well as of the corresponding poly(acene quinone) deriv
ative 4 is reported. Some of the diastereomers of 6 and 7 have been is
olated and their structures clarified by NMR spectroscopy, This inform
ation was used as a basis for assigning the polymer's structure.