10371-01-4Relevant academic research and scientific papers
Cation-exchanged Montmorillonite Clays as Lewis Acid Catalysts in the Fries Rearrangement of Phenyl Toluene-p-sulphonate
Pitchumani, Kasi,Pandian, A.
, p. 1613 - 1614 (1990)
Cation-exchanged montmorillonite clays catalyse the Fries rearrangement of phenyl toluene-p-sulphonate to give selectively 2- and 4-hydroxyphenyl p-tolyl sulphones as major and minor products respectively.
Regioselectivity control of radiation-induced reaction: Electron beam-induced Fries rearrangement of sulfonamide within a β-cyclodextrin inclusion complex
Kato, Jun,Kakehata, Hiroyuki,Maekawa, Yasunari,Yamashita, Takashi
, p. 4498 - 4500 (2006)
EB (electron beam) irradiation of sulfonamide within a β-cyclodextrin (β-CD) inclusion complex in the solid state induced the solvent-free Fries rearrangement, which proceeded at a shorter reaction time with reversed regioselectivity by inclusion into the β-CD, compared with that of sulfonamide crystals; the β-CD as a restricted nanospace had a large effect on the reactivity and regioselectivity of the solvent-free EB-Fries rearrangement. The Royal Society of Chemistry 2006.
Graphite/methanesulfonic acid (GMA) as a new reagent for sulfonylation of phenols and thia-Fries rearrangement of aryl sulfonates to sulfonylphenols
Sharghi, Hashem,Shahsavari-Fard, Zahra
, p. 42 - 52 (2007/10/03)
A new facile method for direct sulfonylation of phenols was developed. Graphite in methanesulfonic acid (GMA) was used to prepare sulfonylphenols by sulfonylation of phenol and naphthalene derivatives with p-toluenesulfonic acid (=4-methylbenzenesulfonic acid) (Table 1) and the thia-Fries rearrangement of aryl sulfonates (Table 4). Mechanistic studies showed that the sulfonylation reaction of phenols in GMA occurred through an initial sulfonate formation followed by a thia-Fries rearrangement of the aryl sulfonate by an intermolecular mechanism (Scheme 3).
Al2O3/MeSO3H (AMA) as a new reagent for the thia-Fries rearrangement of arylsulfonates to hydroxyaryl sulfones
Sharghi, Hashem,Shahsavari-Fard, Zahra
, p. 2491 - 2501 (2007/10/03)
A new facile method for thia-Fries rearrangement of arylsulfonates has been developed. A variety of arylsulfonates rearrange in excellent yields in the presence of Al2O3/MeSO3H as a new reagent without the use of any solve
Fries rearrangement of arylsulfonates and sulfonanilides under microwave irradiation
Das, Biswanath,Madhusudhan, Purushotham,Venkataiah, Bollu
, p. 200 - 201 (2007/10/03)
Fries rearrangements of arylsulfonates and sulfonanilides under microwave irradiation afforded hydroxy and aminoaryl sulfones respectively in very short times and in excellent yields. The conversion showed high selectivity to produce 2- and 4- hydroxyaryl sulfones as the major and minor products respectively from arylsulfonates and 2-aminoaryl sulfones exclusively from aryl sulfonanilides.
Thia-Fries rearrangement of aryl sulfonates in dry media under microwave activation
Moghaddam, Firouz Matloubi,Dakamin, Mohammad G.
, p. 3479 - 3481 (2007/10/03)
An AlCl3-ZnCl2 mixture supported on silica gel is found to be a new efficient medium for the thia-Fries rearrangement of aryl sulfonates in solvent-free conditions under microwave dielectric heating. (C) 2000 Elsevier Science Ltd.
Modification of photochemical behaviour upon cyclodextrin complexation: Photo-Fries rearrangement of sulphonate esters
Pitchumani, K.,Manickam, M. C. Durai,Srinivasan, C.
, p. 1074 - 1076 (2007/10/02)
Irradiation of solid cyclodextrin complexes of phenyl benzenesulfonate and phenyl para-toluenesulfonate shows a remarkable ortho-selectivity by yielding exclusively the corresponding ortho-rearranged products in contrast to the formation of ortho- and par
