- Visible-Light Photoredox/Nickel Dual Catalysis for the Cross-Coupling of Sulfinic Acid Salts with Aryl Iodides
-
An efficient cross-coupling of sodium or lithium sulfinates with aryl iodides, using a combination of nickel and photoredox catalysis, is described. The dual catalyst system enables a versatile synthesis of aryl sulfones at room temperature in good yields and displays a broad functional group compatibility. The potential utility of this method in the late-stage diversification of complex molecules and in the conversion of organolithium reagents and sulfur dioxide into sulfones is demonstrated.
- Liu, Nai-Wei,Hofman, Kamil,Herbert, André,Manolikakes, Georg
-
supporting information
p. 760 - 763
(2018/02/09)
-
- New route for the synthesis of N-alkyl-2-(phenylsulfonyl)anilines
-
[Figure not available: see fulltext.] The main objective of this work was to study the rearrangement reactions of 1-alkyl-2-[(phenylsulfonyl)methyl]pyridinium iodides in the presence of various nucleophiles, leading to N-alkyl-2-(phenylsulfonyl)aniline derivatives. The best results were achieved with alkylammonium sulfites, leading to pyridine ring opening followed by recyclization to give diphenyl sulfone derivatives in up to 78% yields.
- Hossan, Aisha
-
p. 570 - 573
(2017/03/16)
-
- Electron beam-induced fries rearrangement of sulfonamide and sulfonate crystals
-
The electron beam (EB) sensitivity of sulfonic acid derivatives in the crystalline state was much higher than that of the corresponding carboxylic acid derivatives, which was distinct from the results using other energy sources such as heat and UV; especially, sulfonamide derivatives could undergo the chemoselective Fries rearrangement to give ortho and para products in the ratio of ca. 7/3 without the meta isomer. Copyright
- Kato, Jun,Maekawa, Yasunari,Yoshida, Masaru
-
p. 266 - 267
(2007/10/03)
-
- Preparation process of fluorine substituted aromatic compound
-
A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylamino-difluoromethane compound, for example, 2,2′-difluoro-1,3-dimethylimidazolidine, is exemplified. According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.
- -
-
-
- Fries rearrangement of arylsulfonates and sulfonanilides under microwave irradiation
-
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.
- Das, Biswanath,Madhusudhan, Purushotham,Venkataiah, Bollu
-
p. 200 - 201
(2007/10/03)
-
- Modification of photochemical behaviour upon cyclodextrin complexation: Photo-Fries rearrangement of sulphonate esters
-
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
- Pitchumani, K.,Manickam, M. C. Durai,Srinivasan, C.
-
p. 1074 - 1076
(2007/10/02)
-