Patent US4554112A successfully refreshed from Google Patents.
US4554112A
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Method for the preparation of vinyl compounds
Assignee: Dow Chemical Co
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Filing: 1981-04-30
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Granted: 1985-11-19
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Expires: 2001-04-30
Abstract
Abstract Fluorovinyl compounds having the formula TLCF═CF.sub.2 are prepared by reacting compounds having the formula ##STR1## for a time and at a temperature sufficient to form the vinyl compound: where X=Cl, Br or I; Z=F, Cl, Br, OH, NRR', OA, or SA; R and R' are independently selected from the group consisting of hydrogen, an alkyl having one or more than one carbon atom, and aryl; A=Alkali metal, alkali earth metal, quaternary nitrogen, or R; L=oxygen or sulfur; and T=an alkyl or aryl radical which does not interfere with the reaction.
Inventors
- 👤 Bobby R. Ezzell
- 👤 William P. Carl
- 👤 William A. Mod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:40
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/18; C07C41/24; C07C309/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A method of preparing a compound having the formula: TLCF═CF.sub.2 (I) comprising: reacting a compound having the general formula: ##STR23## for a time and at a temperature sufficient to convert at least a portion of compound (II) directly into compound (I); where X=Cl, Br or I; Z=F, Cl, Br, OH, NRR', OA, or SA; R and R' are independently selected from the group consisting of hydrogen, an alkyl having one or more than one carbon atom, and aryl; A=alkali metal, alkali earth metal, quaternary nitrogen, or R; L=oxygen, or sulfur; and T=an alkyl or aryl radical which does not interfere with the reaction.
Claim 2
Independent Claim
103 words
A method of preparing a compound having the formula: TLCF═CF.sub.2 (I) comprising: reacting a compound having the general formula: ##STR23## for a time and at a temperature sufficient to convert at least a portion of compound (II) directly into compound (I); where X=Cl, Br or I; Z=F, Cl, Br, OH, NRR', OA, or SA; R and R' are independently selected from the group consisting of hydrogen, an alkyl having one or more than one carbon atom, and aryl; A=alkali metal, alkali earth metal, quaternary nitrogen, or R; L=oxygen, or sulfur; and T=an alkyl or aryl radical which does not interfere with the reaction.
Claim 3
Dependent Claim
13 words
The method of claim 1 carried out in the presence of an activator.
Claim 4
Dependent Claim
11 words
The method of claim 2 where the activator is a base.
Claim 5
Dependent Claim
17 words
The method of claim 1 where the temperature is from about -50° C. to about 200° C.
Claim 6
Dependent Claim
9 words
The method of claim 1 where L is oxygen.
Claim 7
Dependent Claim
17 words
The method of claim 1 where T is an alkyl having from 1 to 20 carbon atoms.
Claim 8
Dependent Claim
11 words
The method of claim 6 where T is a perhalogenated radical.
Claim 9
Dependent Claim
12 words
The method of claim 6 where T contains oxygen in its structure.
Claim 10
Independent Claim
17 words
The method of claims 1, 2, 3, 4, 5, 6, 7 or 8 where X is Cl.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |