108980-60-5Relevant academic research and scientific papers
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
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.
