Synthetic Applications of Sulfonium Salts as Aryl Radical Precursors

An efficient synthesis of imidazolinium salts using vinyl sulfonium salts.

The synthesis of imidazolinium salts from the reaction of formamidines and (2-bromoethyl)diphenylsulfonium triflate is described. A variety of symmetrical and unsymmetrical imidazolinium triflate salts were synthesized in high yield in short reaction times under mild conditions. Aromatic and aliphatic N-substituents work well. The reaction is proposed to proceed via generation of a vinyl sulfon...

Copper-mediated trifluoromethylation of arylboronic acids by trifluoromethyl sulfonium salts.

The ligand-free trifluoromethylation of arylboronic acids with a [Ph(2)SCF(3)](+)[OTf](-)/Cu(0) system has been carefully investigated. Aryl-, alkenyl- and heteroarylboronic acids with a variety of functional groups were suitable substrates for this reaction. It is suggested that a CuCF(3) species is formed under the reaction conditions.

Straightforward one-pot synthesis of trifluoromethyl sulfonium salts.

Determination of Synthetic Precursors as Impurities in Diclofenac Sodium Raw Material

Impurities of drug substances may produce some side effects in patient. Diclofenac Na is a member of non-steroidal anti inflammatory drugs (NSAIDs) family, which is routinely used by patients for the treatment of rheumatoid arthritis and various pains. To develop a method for the determination of synthetic precursors which could be remained as impurities in raw drug materials, Na diclofenac pow...

Determination of Synthetic Precursors as Impurities in Diclofenac Sodium Raw Material

Impurities of drug substances may produce some side effects in patient. Diclofenac Na is a member of non-steroidal anti inflammatory drugs (NSAIDs) family, which is routinely used by patients for the treatment of rheumatoid arthritis and various pains. To develop a method for the determination of synthetic precursors which could be remained as impurities in raw drug materials, Na diclofenac pow...