GB398947A - The manufacture of arylisothiazolones - Google Patents
The manufacture of arylisothiazolonesInfo
- Publication number
- GB398947A GB398947A GB1275732A GB1275732A GB398947A GB 398947 A GB398947 A GB 398947A GB 1275732 A GB1275732 A GB 1275732A GB 1275732 A GB1275732 A GB 1275732A GB 398947 A GB398947 A GB 398947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphochloride
- benzene
- ethoxy
- cyano
- acid
- 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
Abstract
Arylisothiazolones are obtained by treating aryl - o - cyanosulphochlorides with metallic reducing agents in presence of a mineral acid and an organic solvent at temperatures below 60 DEG . The amount of reducing agent is such as to liberate four reactive hydrogen atoms per molecule of sulphochloride and the reaction is taken to such a point that a test fails to show the mercaptan reaction. According to examples, 1 - methyl - 2-cyan - 5-chlor-benzene-3-sulphonic acid after conversion to the sulphochloride with phosphorus pentachloride gives 4-methyl-6-chloro-benz-isothiazolone-3, and 1-ethoxy-4-amino-benzene - 5 - sulphochloride (obtained by converting 1 - ethoxy - 4 - amino-benzene-5-sulphonic acid into the 4-cyano compound and treating with phosphorus pentachloride) gives 6 - ethoxy-benz-isothiazolone - 3, on treatment with zinc dust and hydrochloric or sulphuric acid respectively. Cyano-benzene-o-sulphochloride and naphthalene-2-cyano-1-sulphochloride are also specified and glacial acetic acid and other metallic reducing agents such as tin may be employed. British Specification 319,075, [Class 2 (iii), Dyes &c.], and German Specification 216,269 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1275732A GB398947A (en) | 1932-05-03 | 1932-05-03 | The manufacture of arylisothiazolones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1275732A GB398947A (en) | 1932-05-03 | 1932-05-03 | The manufacture of arylisothiazolones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB398947A true GB398947A (en) | 1933-09-28 |
Family
ID=10010559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1275732A Expired GB398947A (en) | 1932-05-03 | 1932-05-03 | The manufacture of arylisothiazolones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB398947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3065123A (en) * | 1959-06-24 | 1962-11-20 | Ici Ltd | Process for control of micro-organisms |
-
1932
- 1932-05-03 GB GB1275732A patent/GB398947A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3065123A (en) * | 1959-06-24 | 1962-11-20 | Ici Ltd | Process for control of micro-organisms |
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