# US 7,612,217 B2 · Sulfonium compound

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- Number: US 7,612,217 B2
- Document ID: US7612217B2
- Status: Granted
- Kind: B2
- Application number: 11/889,352
- Filed: 2007-08-10
- Published: 2008-04-03
- Granted: 2009-11-03
- Earliest claimed: 2006-08-18
- Assignees: Sumitomo Chemical Company, Limited
- Inventors: Hiromu Sakamoto; Yukako Harada
- Web page: https://patentgrep.com/patent/US7612217B2

## CPC

- C07C 381/12: Sulfonium compounds
- C07C 303/32: of salts of sulfonic acids
- C07C 309/17: containing carboxyl groups bound to the carbon skeleton
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The present invention provides a sulfonium compound represented by the formula (I): wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A+ represents an organic counter ion.

## Claims

### Claim 1

A sulfonium compound represented by the formula (I):
wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A+ represents an organic counter ion;
wherein the organic counter ion is at least one cation selected from a cation represented by the formula (IIa):
wherein P1, P2 and P3 each independently represent a C1-C30 alkyl group which may be substituted with at least one selected from a hydroxyl group, a C3-C12 cyclic hydrocarbon group and a C1-C12 alkoxy group, or a C3-C30 cyclic hydrocarbon group which may be substituted with at least one selected from a hydroxyl group and a C1-C12 alkoxy group, a cation represented by the formula (IIb):
wherein P4 and P5 each independently represent a hydrogen atom, a hydroxyl group, a C1-C12 alkyl group or a C1-C12 alkoxy group, a cation represented by the formula (IIc):
wherein P6 and P7 each independently represent a C1-C12 alkyl group or a C3-C12 cycloalkyl group, or P6 and P7 are bonded together to form a C3-C12 divalent acyclic hydrocarbon group which forms a ring together with the adjacent S+, and at least one —CH2— in the divalent acyclic hydrocarbon group may be replaced with —CO—, —O— or —S—, P8 represents a hydrogen atom, P9 represents a C1-C12 alkyl group, a C3-C12 cycloalkyl group or an aromatic group which may be substituted, or P8 and P9 are bonded together to form a divalent acyclic hydrocarbon group which forms a 2-oxocycloalkyl group together with the adjacent —CHCO—, and at least one —CH2— in the divalent acyclic hydrocarbon group may be replaced with —CO—, —O— or —S—, and a cation represented by the formula (IId):
wherein P10, P11, P12, P13, P14, P15, P16, P17, P18, P19,P20and P21each independently represent a hydrogen atom, a hydroxyl group, a C1-C12 alkyl group or a C1-C12 alkoxy group, B represents a sulfur or oxygen atom and k represents 0 or 1.

### Claim 2

A sulfonium compound represented by the formula (I):
wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A+ represents an organic counter ion;
wherein the organic counter ion is a cation represented by the formula (IIIa), (IIIb) or (IIIc):
wherein P22, P23 and P24 each independently represent a C1-C20 alkyl group or a C3-C30 cyclic hydrocarbon group except a phenyl group, wherein at least one hydrogen atom in the C1-C20 alkyl group may be substituted with a hydroxyl group, a C1-C12 alkoxy group or a C3-C12 cyclic hydrocarbon group and wherein at least one hydrogen atom in the C3-C30 cyclic hydrocarbon group may be substituted with a hydroxyl group, a C1-C12 alkyl group or a C1-C12 alkoxy group, and P25, P26, P27, P28, P29 and P30 each independently represent a hydroxyl group, a C1-C12 alkyl group, a C1-C12 alkoxy group or a C3-C12 cyclic hydrocarbon group, and l, m, n, p, q and r each independently represent an integer of 0 to 5.

### Claim 3

A sulfonium compound represented by the formula (I):
wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A+ represents an organic counter ion;
wherein the organic counter ion is a cation represented by the formula (IIIa):
wherein P25, P26, and P27 each independently represent a hydroxyl group, a C1-C12 alkyl group, a C1-C12 alkoxy group, or a C3-12 cyclic hydrocarbon group, and l, m and n each independently represent an integer of 0 to 5.

### Claim 4

A sulfonium compound represented by the formula (IV):
wherein P25, P26, and P27 each independently represent a hydroxyl group, a C1-C12 alkyl group, a C1-C12 alkoxy group, or a C3-C12 cyclic hydrocarbon group, and l, m and n each independently represent an integer of 0 to 5.

### Claim 5

A process for production of a sulfonate compound represented by the formula (VIII):
wherein Q1 and Q2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, A+ represents an organic counter ion, and X represents a C1-C30 hydrocarbon group which may be substituted, which comprises reacting a sulfonium compound represented by the formula (I):
wherein Q1, Q2 and A+ are the same as defined above, with a compound represented by the formula (VII):
HO—X (VII)
wherein X is the same as defined above.