GB466007A - Manufacture of benzaldehydes containing trifluoromethyl groups - Google Patents
Manufacture of benzaldehydes containing trifluoromethyl groupsInfo
- Publication number
- GB466007A GB466007A GB3215635A GB3215635A GB466007A GB 466007 A GB466007 A GB 466007A GB 3215635 A GB3215635 A GB 3215635A GB 3215635 A GB3215635 A GB 3215635A GB 466007 A GB466007 A GB 466007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trifluoromethyl
- benzaldehydes
- benzalfluorides
- benzaldehyde
- give
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
- C07C47/55—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings containing halogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/42—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by hydrolysis
- C07C45/43—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by hydrolysis of >CX2 groups, X being halogen
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Trifluoromethyl benzaldehydes are made by treating trifluoromethyl benzalfluorides with concentrated sulphuric acid at a raised temperature. The products are easily oxidized to the corresponding benzoic acids, combine with bisulphite, and give the corresponding acid chlorides with chlorine. They are intermediates for dyestuffs, pharmaceutical products and fungicides or insecticides. In examples: (1) o- (or m- or p-) trifluoromethyl-benzaldehyde is obtained from o- (or m- or p-) trifluoromethyl-benzalfluoride; (2) the corresponding nuclearly substituted xylene pentafluorides, such as the mono- or di-halogen derivatives, give the corresponding trifluoromethyl-benzaldehydes, such as 4-chloro-1-trifluoromethyl-2-benzaldehyde; (3) the octachlorination product of pseudocumene is converted to the corresponding octafluoro compound, and the latter, or mesitylene octafluoride or a nuclear substitution product of either is treated with sulphuric acid. Trifluoromethyl - benzalfluorides are obtained from polymethylbenzenes by chlorination according to Specification 114,645, [Class 2 (iii)], or 465,885 to produce a trichloromethyl-benzalchloride, followed by exchanging the chlorine atoms for fluorine according to any known process such as that described in Specification 395,227.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3215635A GB466007A (en) | 1935-11-20 | 1935-11-20 | Manufacture of benzaldehydes containing trifluoromethyl groups |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3215635A GB466007A (en) | 1935-11-20 | 1935-11-20 | Manufacture of benzaldehydes containing trifluoromethyl groups |
Publications (1)
Publication Number | Publication Date |
---|---|
GB466007A true GB466007A (en) | 1937-05-20 |
Family
ID=10334159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3215635A Expired GB466007A (en) | 1935-11-20 | 1935-11-20 | Manufacture of benzaldehydes containing trifluoromethyl groups |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB466007A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2614298A1 (en) * | 1987-04-22 | 1988-10-28 | Central Glass Co Ltd | PROCESS FOR PREPARING TRIFLUOROMETHYLBENZOIC ACID FROM HEXAFLUOROXYLENE |
-
1935
- 1935-11-20 GB GB3215635A patent/GB466007A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2614298A1 (en) * | 1987-04-22 | 1988-10-28 | Central Glass Co Ltd | PROCESS FOR PREPARING TRIFLUOROMETHYLBENZOIC ACID FROM HEXAFLUOROXYLENE |
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