3938-10-1Relevant academic research and scientific papers
Efficient ortho-oxidation of phenols with diacyl peroxides
Tada, Masahiro,Ishiguro, Risa,Izumi, Ryohei
, p. 239 - 242 (2008/09/21)
A stable symmetric diacyl peroxide, m-chlorobenzoyl peroxide (mCBPO), and an asymmetric diacyl peroxide, chloroacetyl m-chlorobenzoyl peroxide (CAMCBPO), were synthesized from m-chloroperbenzoic acid. Both peroxides oxidized phenols selectively at the ortho position predoninantly. CAMCBPO gave para-oxidized compounds as minor products from some phenols. The improvement of the yield of ortho-oxidation of phenols with mCBPO was also reported.
Process for preparing trimethylhydroquinone diacetate and trimethylhydroquinone
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Example 4, (2008/06/13)
A process for preparing trimethylhydroquinone diacetate, with subsequent hydrolysis to give trimethylhydroquinone, the process including reacting 2,2,6-trimethylcyclohexane-1,4-dione under oxidative conditions, in the presence of a sulfonating agent and a strong acid, and in the presence of an acylating agent.
Trimethylcatechol diester and a method for producing the same
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, (2008/06/13)
This method provides a novel trimethylcatechol diester, i.e. 3,4,5-trimethylcatechol diester, at a high yield by reacting 2,6,6-trimethylcyclohexe-2-en-1,4-dione with an acylating agent in the presence of an acid catalyst. The acylating agent includes a C2-4 carboxylic acid anhydride (e.g. acetic anhydride) and a C2-4 carboxylic acid halide (e.g. acetyl chloride). The catalyst includes a protonic acid and a Lewis acid. Use of a polar solvent (e.g. halogenated hydrocarbon), as the reaction catalyst, results in an enhanced efficiency in the production of the object compound.
Electronic and Steric Effects in the Dienone-Phenol Rearrangement of 2-Hydroxy- and 2-Alkoxycyclohexa-2,5-dien-1-ones
Frimer, Aryeh A.,Marks, Vered,Sprecher, Milon,Gilinsky-Sharon, Pessia
, p. 1831 - 1834 (2007/10/02)
A series of 4,4,6-trisubstituted-2-hydroxy- and -2-alkoxycyclohexa-2,5-dien-1-ones (7 and 8) were prepared, where the substituent at C-6 was H, CH3, Ph, tert-butyl, or OEt.In the acid-catalyzed dienone-phenol rearrangement of 7 and 8, the C-4 substituent
