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US3607883A
Expired / Lapsed
US
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Bromine chloride-dioxane complex
Assignee: Dow Chemical Co
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Filing: 1969-04-24
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Granted: 1971-09-21
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Expires: 1989-04-24
Abstract
Abstract A bromine chloride complex of p-dioxane has been discovered which is useful as a solid source of bromine chloride. A dioxanebromine chloride complex formed by mixing bromine chloride with dioxane in methylene chloride at 10* C. has been used to selectively brominate salicylanilide to give an 88 percent yield of 3,4'',5-tribromosalicylanilide.
Inventors
- 👤 John A Schneider
- 👤 Jack F Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:57
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The process for preparing the composition of matter defined in claim 1 comprising reacting by contacting in a suitable solvent bromine chloride with p-dioxane.
Claim 2
Dependent Claim
20 words
The process defined in claim 2 wherein the ratio of dioxane to bromine chloride is about 0.9 to about 20.
Claim 3
Dependent Claim
18 words
The process defined in claim 2 wherein the solvent is a lower chlorinated solvent or lower alkyl ether.
Claim 4
Dependent Claim
14 words
The process defined in claim 2 wherein the temperature is less than 40* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |