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US4922041A
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Method for producing CF3 I
Assignee: Kali Chemie AG
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Filing: 1988-05-19
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Granted: 1990-05-01
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Expires: 2008-05-19
Abstract
Abstract A method for producing trifluoroiodomethane in which a metal Mt selected from the group magnesium, zinc, cadmium, bismuth and tin is reacted in a first step (a) with a trifluorohalomethane, and the resulting reaction mixture is further reacted in a second step (b) with a component containing iodine to produce CF 3 I. Compounds corresponding to the formula CF 3 .Zn.X.nL are also described.
Inventors
- 👤 Dieter Naumann
- 👤 Wieland Tyrra
- 👤 Birgit Kock
- 👤 Werner Rudolph
- 👤 Bernd Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:29
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/06; C07C; C07C17/00; C07C17/093
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
113 words
A method of producing CF 3 I, comprising the steps of: (a) reacting in an unreactive solvent comprising at least one polar aprotic solvent selected from the group consisting of cyclic ethers, acyclic ethers, unsubstituted and substituted carboxylic acid amides, unsubstituted and substituted lactams, nitriles, sulfoxides, amines and pyridines, a compound corresponding to the formula CF 3 X, wherein X represents Cl or Br, with a metal selected from the group consisting of magnesium, zinc, cadmium, bismuth and tin; and (b) reacting the resulting organometallic reaction product with a compound corresponding to the formula I-Y, wherein Y represents iodine or a ligand which is more electronegative than iodine, to produce CF 3 I.
Claim 2
Independent Claim
113 words
A method of producing CF 3 I, comprising the steps of: (a) reacting in an unreactive solvent comprising at least one polar aprotic solvent selected from the group consisting of cyclic ethers, acyclic ethers, unsubstituted and substituted carboxylic acid amides, unsubstituted and substituted lactams, nitriles, sulfoxides, amines and pyridines, a compound corresponding to the formula CF 3 X, wherein X represents Cl or Br, with a metal selected from the group consisting of magnesium, zinc, cadmium, bismuth and tin; and (b) reacting the resulting organometallic reaction product with a compound corresponding to the formula I-Y, wherein Y represents iodine or a ligand which is more electronegative than iodine, to produce CF 3 I.
Claim 3
Dependent Claim
42 words
A method according to claim 1, wherein the reaction step (b) is carried out in a solvent selected from the group consisting of tetrahydrofuran, dioxane, diethyl ether, N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl pyrrolidone, N-ethyl pyrrolidone, acetonitrile, benzonitrile, triethylamine, dimethyl sulfoxide, pyridine and methyl pyridine.
Claim 4
Dependent Claim
11 words
A method according to claim 1, wherein said metal is zinc.
Claim 5
Dependent Claim
49 words
A method according to claim 3, wherein step (a) further comprises isolating the resulting organometallic intermediate compound corresponding to the Formula (I) CF.sub.3.Zn.X.nL (I) wherein X has the meaning given in claim 1, n represents the number 1 or 2 and L represents an organic, solar aprotic complexing agent.
Claim 6
Dependent Claim
42 words
A method according to claim 1 wherein said polar aprotic solvent is a ligand solvent selected from the group consisting of tetrahydrofuran, dioxane, diethyl ether, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl pyrolidone, N-ethyl pyrrolidone, acetonitrile, benzonitrile, triethylamine, dimethyl sulfoxide, pyridine and methyl pyridine.
Claim 7
Dependent Claim
21 words
A method according to claim 1, wherein the reaction in step (b) is carried out in a polar, aprotic solvent medium.
Claim 8
Dependent Claim
39 words
A method according to claim 4, wherein said complexing agent L is a ligand selected from the group consisting of cyclic ethers, acyclic ethers, unsubstituted and substituted carboxylic acid amides, unsubstituted and substituted lactams, nitriles, sulfoxides, amines and pyridines.
Claim 9
Dependent Claim
15 words
A method according to claim 4, wherein said solvent and said complexing agent are identical.
Claim 10
Dependent Claim
15 words
A method according to claim 8, wherein said solvent is an N-disubstituted carboxylic acid amide.
Claim 11
Dependent Claim
15 words
A method according to claim 9, wherein said N-disubstituted carboxylic acid amide is N,N-dimethylformamide (DMF).
Claim 12
Dependent Claim
34 words
A method according to claim 1, wherein step (a) is carried out in the presence of a catalytically effective quantity of a metal which is more electropositive than the metal used for the reaction.
Claim 13
Dependent Claim
20 words
A method according to claim 1, wherein step (a) is carried out in the presence of a Grignard reaction-activating additive.
Claim 14
Dependent Claim
26 words
A method according to claim 12, wherein said Grignard reaction-activating additive is a halogen-containing agent selected from the group consisting of iodine and CCl 4 .
Claim 15
Dependent Claim
10 words
A method according to claim 1, wherein Y represents halogen.
Claim 16
Dependent Claim
20 words
A method according to claim 14, wherein said halogen is selected from the group consisting of chlorine, bromine and iodine.
Claim 17
Dependent Claim
22 words
A method according to claim 1, wherein step (a) is carried out at up to a maximum of 50 bar absolute pressure.
Claim 18
Dependent Claim
27 words
A method according to claim 16, wherein said pressure is in the range from 1 bar absolute up to the equilibrium pressure determined by the reaction temperature.
References Cited (Backward Citations)
US4701569A
Cited
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