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Synthesis of poly(sulfonium cation) as an alkylating reagent
Author(s) -
Shouji E.,
Nishimura S.,
Yamamoto K.,
Tsuchida E.
Publication year - 1994
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1994.220050907
Subject(s) - sulfonium , demethylation , aniline , benzoic acid , sulfide , reagent , phenylene , solubility , polymer chemistry , solvent , phosphoric acid , nucleophile , yield (engineering) , dimethyl sulfate , phenol , organic chemistry , chemistry , methyl methacrylate , dimethyl sulfoxide , materials science , polymerization , polymer , biochemistry , salt (chemistry) , gene expression , metallurgy , dna methylation , catalysis , gene
Methyl 4‐phenylthiophenyl sulfoxide is polymerized to poly(methyl‐4‐phenylthiophenylsulfonium) in poly(phosphoric acid) with a yield higher than 90%. The demethylation of poly(sufonium cation) is examined to control the composition ratio of the thiophenylene unit in the polycation. The polycation is soluble in common solvents due to the alternative structure of phenylene sufide and phenylenesulfonium cation and is easily converted to poly(phenylene sulfide) through the demethylation with a nucleophile. The poly(sulfonium cation) can be applicable as an alkylating agent for phenol, aniline and benzoic acid to the corresponding to anisole, N‐methyl aniline, N,N‐dimethyl aniline and benzoic methyl ester, respectively, with high conversion through the demethylation. These products can be isolated without a complicated purification because poly(phenylene sulfide) is precipitated in the mixture as the side product due to the poor solvent solubility.