- Acylation of Phenols with Salicylic Acid Using Polyphosphoric Acid
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Acylation of 2-naphthol (2), 1-naphthol (6) and resorcinol (11) with salicylic acid (1) in the presence of PPA affords salicylate esters (4, 7, 13 and 14), 1,2-benzoxanthone (5), 3,4-benzoxanthone (8), 3-hydroxyxanthone (12), 2-salicoyl-1-naphthol (9) and 11-hydroxy-12H-benzoxanthen-12-one (10).Compounds (4, 5, 7, 8, 12, 13 and 14) are identical with those obtained by heating a mixture of phenyl salicylate (3) and phenols (2, 6 and 11).
- Kamat, S. P.,Paknikar, S. K.
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p. 773 - 774
(2007/10/02)
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- Thermal Conversion of Salol into Xanthone: A Mechanistic Study
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The thermal conversion of salol (1) into xanthone has been rationalized as proceeding via the keto-ketene intermediate (7) which is trapped by phenols (9, 12 and 15).
- Kamat, S. P.,Paknikar, S. K.
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