Patent US4786441A successfully refreshed from Google Patents.
US4786441A
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Preparation of iodonium and sulfonium triflates
Assignee: International Business Machines Corp
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Filing: 1987-08-24
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Granted: 1988-11-22
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Expires: 2007-08-24
Abstract
Abstract An iodonium or sulfonium triflate is prepared by dissolving or slurring a iodonium or sulfonium halide in an organic solvent and reacting it with a trimethylsilyl triflate.
Inventors
- 👤 Robert D. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:13
CPC Classifications
C; C07; C07C; C07C381/00; C07C381/12; C07C17/00; C07C17/35; C07C303/00; C07C303/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
A process for preparing an iodonium or sulfonium triflate, said process comprising dissolving or slurring a iodonium or sulfonium halide in an organic solvent and reacting it with trimethylsilyl triflate.
Claim 2
Dependent Claim
30 words
A process for preparing an iodonium or sulfonium triflate, said process comprising dissolving or slurring a iodonium or sulfonium halide in an organic solvent and reacting it with trimethylsilyl triflate.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the trimethylsilyl triflate is present at about 10% molar excess.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1 wherein the organic solvent is methylene chloride.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1 wherein the organic solvent is 1,2-dichloroethane.
Claim 6
Dependent Claim
16 words
A process as claimed in claim 1 wherein the reaction is carried out at room temperature.
Claim 7
Dependent Claim
38 words
A process for preparing an iodonium or sulfonium triflate, said process comprising dissolving or slurring a iodonium or sulfonium halide in methylene chloride and reacting it at room temperature with about a 10% molar excess of trimethylsilyl triflate.
Claim 8
Dependent Claim
38 words
A process for preparing an iodonium or sulfonium triflate, said process comprising dissolving or slurring a iodonium or sulfonium halide in methylene chloride and reacting it at room temperature with about a 10% molar excess of trimethylsilyl triflate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |