Phenylpropiolic acids. Part VIII. The self-condensation of 3-halogeno-4-methoxyphenylpropiolic acids
Journal of the Chemical Society C: Organic Pub Date: DOI: 10.1039/J39680000110
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.
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Journal Name：Journal of the Chemical Society C: Organic
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CAS no.: 89640-58-4
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