Process for production of bis-quaternary ammonium salt, and novel intermediate
View Patent ↗Object To provide a method for producing a bis-quaternary ammonium salt efficiently and a novel synthetic intermediate thereof. Solution The present invention relates to a method for producing a bis-quaternary ammonium salt represented by a general formula [3] which comprises reacting a disulfonic acid ester represented by a general formula [1] (in the formula, definitions of two R 1 's and T are as described in claim 1 ) with a tertiary amine represented by a general formula [2] (in the formula, definitions of R 3 to R 5 are as described in claim 1 ), and a disulfonic acid ester represented by a general formula [1′] (in the formula, two R 16 's represent independently a halogen atom or a C1-C3 fluoroalkyl group, and two m's represent independently an integer of 1 to 5).
1. A method for producing a bis-quaternary ammonium salt represented by a formula (3), which comprises reacting a disulfonic acid ester represented by a formula (1) with a tertiary amine represented by a formula (2):
wherein R 1 represents an alkyl group, which may have at least one substituent, a haloalkyl group, a heteroatom-containing alkyl group, which may have at least one substituent, a phenyl group, which may have at least one substituent selected from the group consisting of halogen and a C 1 -C 3 fluoroalkyl group independently, an aralkyl group, which may have at least one substituent, a heterocyclic group, which may have at least one substituent, or an unsaturated hydrocarbon group, and T represents a C 1 -C 3 alkylene chain,
wherein R 3 to R 5 represent independently an alkyl group or a heteroatom-containing alkyl group, R 3 and R 4 or R 3 to R 5 and nitrogen bonding thereto may form a heterocycle, and
wherein R 1 , R 3 to R 5 , and T are the same as the above.
2. The producing method according to claim 1 , wherein T is a methylene group.
3. The producing method according to claim 1 , wherein the tertiary amine represented by the formula (2) is pyridine, 3-methylpyridine, 3,5-dimethylpyridine, 1-methylimidazole, 1,2-dimethylimidazole, or tributylamine.
4. A disulfonic acid ester represented by a following formula (1′):
wherein, two R 16 s represent independently halogen or a C 1 -C 3 fluoroalkyl group, and two ms represent independently an integer from 1 to 5.
5. The producing method according to claim 1 , wherein R 1 is a methyl group or trifluoromethyl group.