Journal
MOLECULES
Volume 6, Issue 3, Pages 279-286Publisher
MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL
DOI: 10.3390/60300279
Keywords
pyrophosphoryl chloride; phosphorus oxychloride; cyclodehydration; cyclic ketones; anthraquinones
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Both pyrophosphoryl chloride and phosphorus oxychloride react: with aryl aliphatic acids to form mixed anhydrides which undergo intramolecular acylation to afford cyclic ketones without the addition of a Friedel-Crafts catalyst. Aryl and aroyl-benzoic acids could be cyclized to the corresponding anthrones and anthraquinones respectively.
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