102096-74-2

Upstream product

• 102096-78-6 (E)-3,5-Diphenyl-1-p-tolyl-pent-2-ene-1,5-dione 
• 98-86-2 acetophenone 
• 4224-96-8 3-phenyl-1-p-tolylprop-2-en-1-one 

Downstream Products

• 7163-50-0 (4-methylphenyl)(oxo)acetic acid 
• 99-94-5 p-Toluic acid 
• 98-86-2 acetophenone 
• 65-85-0 benzoic acid 

Relevant academic research and scientific papers

Pyrylium Compounds. XXI. - Structure and Tautomerism of Pseudobases of Unsymmetrically Substituted 2,4,6-Triarylpyrylium Salts

Hydrolytic ring opening of unsymmetrically substituted 2,4,6-triarylpyrylium salts 11 results in a mixture of two tautomeric pseudobases, the penten-1,5-diones 13 and 14.In crystalline state as a rule one of these tautomers markedly predominates, whereas

Pyrylium Compounds. XXII. 1H-N.M.R. and U.V. Spectroscopic Investigations on the Isomerization of Pseudobases of Unsymmetrically Substituted 2,4,6-Triarylpyrylium Salts

The kinetics and mechanism of the isomerization of the title compounds, the pentene-1,5-diones 2 and 3, were studied by 1H-n.m.r. and u.v. spectroscopy.The equilibrium constants measured vary little near 1, indicating the small influence of substituents on the equilibrium position.The mutual rearrangement 2(*)3 proved to be a base-catalyzed reaction which is characterized by a strictly linear Hammett correlation between lg k and (*)?p.The results obtained suggest resonance-stabilized anions of type 4 as intermediates. - Pseudobases of 3-alkyl-2,4,6-triarylsubstituted pyrylium salts do not undergo a reversible isomerization.