WebAryl arenesulfinates rearrange to the corresponding arenesulfinyl phenols via a thia-Fries rearrangement on catalysis by anhydrous FeCl 3 in dry dichloromethane at room … Web1 Sep 2003 · Abstract Aryl triflinates are transformed to trifluoromethanesulfinylphenols in the presence of aluminum trichloride in dichloromethane at room temperature according …

Thia-Fries rearrangement of aryl sulfonates in dry media under ...

The Fries rearrangement, named for the German chemist Karl Theophil Fries, is a rearrangement reaction of a phenolic ester to a hydroxy aryl ketone by catalysis of Lewis acids. It involves migration of an acyl group of phenol ester to the aryl ring. The reaction is ortho and para selective and one of the two products can be favoured by changing reaction conditions, such as temperature and solvent. Web1 Sep 2003 · Consequently, the thia-Fries rearrangement reaction was performed under argon with a more rigorous exclusion of oxygen. In these last conditions, coupling products 4 were avoided. Download : Download full-size image; Scheme 3. Results of the rearrangement of various phenyl trifluoromethanesulfinates are gathered in Table 1. lena wallace monterey ca

The First Anionic Thia‐Fries Rearrangement at the Cobaltocenium …

Web1 Mar 2024 · anionic thia-Fries rearrangement of 5 is a result of coordinating interactions of the lithium ca tions with oxygen atoms of the product and the diisopropylamine nitrogen … Web5 However, these rearrangements required drastic conditions (A1C13 neat at 120-60°C or in refluxing nitrobenzene) and produced very low yields (generally <20%) of the desired … Web7 Apr 2024 · Fries rearrangement reaction is necessary for the production of ortho-acyl hydroxy 2.2 paracyclophanes, which has significant industrial importance. In the medical … lena wasserfuhr