GB288554A - Manufacture of vat-dyestuffs - Google Patents
Manufacture of vat-dyestuffsInfo
- Publication number
- GB288554A GB288554A GB10713/28A GB1071328A GB288554A GB 288554 A GB288554 A GB 288554A GB 10713/28 A GB10713/28 A GB 10713/28A GB 1071328 A GB1071328 A GB 1071328A GB 288554 A GB288554 A GB 288554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trimethylbenzene
- thioglycollic
- amino
- group
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B7/00—Indigoid dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
288,554. I. G. Farbenindustrie Akt.- Ges. April 11, 1927, [Convention date]. Samples furnished. Thioindigo dyes; oxythionaphthenes.-3 : 5 : 6- Trimethylbenzene-1-thioglycollic acid or a substitution product having a carboxy, cyano or a carboxylic acid amido group in the 2-position is treated with a ring closing agent in order to produce the corresponding 3-hydroxythionaphthene, which by oxidation gives 4: 6 : 7 : 4<1> : 6<1> : 71- hexamethyl-bis-thionaphthene indigo. The 4 : 6 : 7- trimethylhydroxythionaphthene or its active 2- derivatives mav also be condensed with the usual indigoid components to give vat-dyestuffs. In an example, 3 : 5 : 6-trimethylbenzene-1-thioglycollic-2-carboxylic acid nitrile is treated in caustic soda solution with sodium sulphide and the resulting sodium salt of 4: 6 : 7-trimethyl-3- amino-1-thionaphthene-2-carboxylic acid salted out. It is converted into the 4 : 6 : 7-trimethyl-3- oxythionaphthene by treatment in solution with dilute sulphuric acid and is then oxidized to the dyestuff, which dyes cotton from a yellow vat, fast, clear red shades. 3: 5: 6 - Trimethylbenzene - 1-thioglycollic-2- carboxylic acid nitrile can be prepared by exchanging the amino group of 2-amino-1-nitro- 3 : 5 : 6-trimethylbenzene for cyanogen, reducing the nitro group to amino and replacing the latter, in known manner by the thioglycollic acid residue. 3 : 5 : 6 - Trimethylbenzene-T-carboxylic acid amide-1-thioglycollic acid is prepared by hydrolysis of the 3 : 5 : 6-trimethylbenzene-2-cyano-1- thioglycollic acid. 3 : 5 : 6 - Trimethylbenzene-2-carboxylic-1-thioglycollic acid' is obtained from 2-amino-1-nitro- 3 : 5 : 6-trimethylbenzene, by exchanging the amino group for the cyano group and hydrolyzing, reducing the nitro group, and replacing the amino group by the thioglycollic group in known manner.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE288554X | 1927-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB288554A true GB288554A (en) | 1929-07-11 |
Family
ID=6059618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10713/28A Expired GB288554A (en) | 1927-04-11 | 1928-04-11 | Manufacture of vat-dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB288554A (en) |
-
1928
- 1928-04-11 GB GB10713/28A patent/GB288554A/en not_active Expired
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