F. G. Baddar, G. Moussa, M. T. Omar
1968
Citations
0
Influential Citations
3
Citations
Journal
Journal of The Chemical Society C: Organic
Abstract
3-Halogeno-4-methoxyphenylpropiolic acids are converted by acetic anhydride into a mixture of 6- and 8-halogeno-7-methoxy-1-(3-halogeno-4-methoxyphenyl)naphthalene-2,3-dicarboxylic anhydrides.The structure of 6-bromo-7-methoxy-1-(3-bromo-4-methoxyphenyl)naphthalene-2,3-dicarboxylic anhydride was established by its conversion into the corresponding 6,7-dimethoxy derivative. The structure of the remaining anhydrides were established by i.r. and u.v. spectroscopy.The anhydrides are isomerised by aluminium chloride to the corresponding 7H-benzo[c]fluoren-7-one.