β,β-dimethylacrylophenones : BF3.ET2O-POCl3 catalysed acylation of phenols using β, β-dimethylacrylic acid
Boron trifluoride etherate - phosphoryl chloride reagent is a useful reagent for the condensation between phenols and β,β-dimethylacrylic acid. The main products are acrylophenones. But surprisingly hydroquinone gives mono and diacrylates.
Jain, Niveta,Krishnamurty
p. 1237 - 1241
(2007/10/03)
ON THE REACTION OF SUBSTITUTED PHENOLS AND 3-METHYLBUT-2-ENOIC ACID. A COMPARATIVE STUDY
A systematic and comparative study of the reaction of a series of substituted phenols and 3-methylbut-2-enoic acid in zinc chloride/phosphorus oxychloride and aluminum chloride/phosphorus oxychloride reveals that the formation of phenolic esters and 2,2-dimethyl-4-chromanones is strongly influenced by the substituents, their popsition on the aromatic ring of the starting phenols.Based on our study, a mixed Friedel-Crafts and Fries rearrangement mechanism is in operation in these reactions.
Seboek, Peter,Jekoe, Jozsef,Timar, Tibor,Jaszberenyi, Joseph Cs.
p. 2099 - 2114
(2007/10/02)
On the synthesis of substituted 2,2-dimethyl1-4-chromanones and related compounds
A systematic study of the reaction of a series of monosubstituted phenols 3 and 3-methylbut-2-enoic acid 4 in phosphorus oxychloride/zinc chloride revealed that the formation of 4-chromanones was strongly infuenced by the substituents and their position on the aromatic ring of the starting phenols.
Seboek, Peter,Jekoe, Jozsef,Timar, Tibor,Jaszberenyi, Joseph Cs.
p. 2791 - 2794
(2007/10/02)
Fries rearrangement of methoxyphenyl 3-methylbut-2-enoates
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Camps,Coll,Colomina,Messeguer
p. 363 - 368
(2007/10/02)
An Improved Procedure for the Preparation of 2,2-Dimethyl-4-chromanones
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Camps, F.,Coll, J.,Messeguer, A.,Pericas, M. A.,Ricart, S.,et al.
p. 725 - 727
(2007/10/02)
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