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-pyrazolone

Info

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
Application number
GB2937422A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHEMISCHE WERKE ALTSTETTEN A G
Original Assignee
CHEMISCHE WERKE ALTSTETTEN A G
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHEMISCHE WERKE ALTSTETTEN A G filed Critical CHEMISCHE WERKE ALTSTETTEN A G
Priority to GB2937422A priority Critical patent/GB198615A/en
Publication of GB198615A publication Critical patent/GB198615A/en
Expired legal-status Critical Current

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.
GB2937422A 1922-10-27 1922-10-27 Process for the manufacture of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone Expired GB198615A (en)

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)

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