Efficient ortho-oxidation of phenols with diacyl peroxides
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.
Tada, Masahiro,Ishiguro, Risa,Izumi, Ryohei
p. 239 - 242
(2008/09/21)
Fluoroboric acid adsorbed on silica gel as a new and efficient catalyst for acylation of phenols, thiols, alcohols, and amines
Fluoroboric acid supported on silica gel efficiently catalyzes acylation of structurally diverse phenols, alcohols, thiols, and amines under solvent free conditions. Acid-sensitive alcohols are smoothly acylated without competitive side reactions.
Chakraborti, Asit K.,Gulhane, Rajesh
p. 3521 - 3525
(2007/10/03)
Indium(III) chloride as a new, highly efficient, and versatile catalyst for acylation of phenols, thiols, alcohols, and amines
Indium(III) chloride efficiently catalyses the acylation of structurally diverse phenols, alcohols, thiols, and amines under solvent free conditions. Acid sensitive alcohols are smoothly acylated without competitive side reactions. Acylation of 2-hydroxynaphthalene is carried out with carboxylic acids adopting the mixed anhydride protocol using trifluoroacetic anhydride.
Chakraborti, Asit K.,Gulhane, Rajesh
p. 6749 - 6753
(2007/10/03)
Regioselective oxidation of phenols to o-quinones with o-iodoxybenzoic acid (IBX)
Chemical equation presented An efficient regioselective method for oxidation of phenols to o-quinones is reported. When this procedure is combined with a subsequent reduction, it proves to be useful for the construction of a variety of catechols.
Magdziak, Derek,Rodriguez, Andy A.,Van De Water, Ryan W.,Pettus, Thomas R. R.
p. 285 - 288
(2007/10/03)
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