2944-56-1Relevant academic research and scientific papers
Acylation of Phenols with Salicylic Acid Using Polyphosphoric Acid
Kamat, S. P.,Paknikar, S. K.
, p. 773 - 774 (2007/10/02)
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).
Thermal Conversion of Salol into Xanthone: A Mechanistic Study
Kamat, S. P.,Paknikar, S. K.
, p. 38 - 41 (2007/10/02)
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).
Studies in Synthesis of Xanthone Derivatives: Part III+ - A New One-step Synthesis of Xanthones
Patolia, Ravji J.,Trivedi, K. N.
, p. 444 - 447 (2007/10/02)
Ethyl salicylate condenses with different phenols in refluxing diphenyl ether to give various xanthones in good yields.In the case of resorcinol, hydroquinone, catechol and 3,4-xylenol corresponding phenyl salicylate derivatives are also obtained.Condensation with hydroxycoumarins affords pyranoxanthones, which can not be prepared by the Pechmann condensation of hydroxyxanthones.The structures of the intermediates and final products are established by spectral data (IR, PMR and 13C NMR).
