GB198615A - Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone - Google Patents
Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazoloneInfo
- Publication number
- GB198615A GB198615A GB2937422A GB2937422A GB198615A GB 198615 A GB198615 A GB 198615A GB 2937422 A GB2937422 A GB 2937422A GB 2937422 A GB2937422 A GB 2937422A GB 198615 A GB198615 A GB 198615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyrazolone
- dimethyl
- phenyl
- dimethylamino
- manufacture
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D231/44—Oxygen and nitrogen or sulfur and nitrogen atoms
- C07D231/46—Oxygen atom in position 3 or 5 and nitrogen atom in position 4
- C07D231/48—Oxygen atom in position 3 or 5 and nitrogen atom in position 4 with hydrocarbon radicals attached to said nitrogen atom
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
1-Phenyl-2.3.dimethyl-4-dimethylamino-5-pyrazolone is prepared by treating with formaldehyde, in presence of formic acid, 1-phenyl 2-3-dimethyl-4-sulphamino-5-pyrazolone, which may be obtained by treating antipyrin with nitrous acid and reducing the resulting nitrosobody with sodium bisulphite. According to an example, the sulphamino compound is stirred into a boiling mixture of formaldehyde and formic acid and the heating continued until carbon dioxide ceases to be evolved. The required compound is then extracted with benzene and caustic soda lye.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2937422A GB198615A (en) | 1922-10-27 | 1922-10-27 | Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2937422A GB198615A (en) | 1922-10-27 | 1922-10-27 | Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone |
Publications (1)
Publication Number | Publication Date |
---|---|
GB198615A true GB198615A (en) | 1923-06-07 |
Family
ID=10290521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2937422A Expired GB198615A (en) | 1922-10-27 | 1922-10-27 | Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB198615A (en) |
-
1922
- 1922-10-27 GB GB2937422A patent/GB198615A/en not_active Expired
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