GB191215759A - Manufacture of omega-methylsulphites of Amino-substituted Pyrazolones. - Google Patents

Manufacture of omega-methylsulphites of Amino-substituted Pyrazolones.

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Publication number
GB191215759A
GB191215759A GB191215759DA GB191215759A GB 191215759 A GB191215759 A GB 191215759A GB 191215759D A GB191215759D A GB 191215759DA GB 191215759 A GB191215759 A GB 191215759A
Authority
GB
United Kingdom
Prior art keywords
amino
pyrazolone
pyrazolones
ethyl
methyl
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
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of GB191215759A publication Critical patent/GB191215759A/en
Expired legal-status Critical Current

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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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)

Abstract

15,759. Farbwerke vorm. Meister, Lucius, & Br³ning. Feb. 6, [Convention date]. Methylsulphites of aminopyrazolones.-The process for the production of medicinal compounds described in Specification 15,658/12 is modified by replacing 1-phenyl-2:3-dimethyl-4- amino-5-pyrazolone and its derivatives by other 2:3-dialkyl pyrazolones and their derivatives. In examples, the 1-p-tolyl- and 1-p-ethoxyphenyl-2-ethyl-3-methyl-4 - amino -5-pyrazolones are treated with formaldehyde and bisulphite. Amino- and nitroso-pyrazolones.-1-p-Tolyl-2- ethyl-3-methyl-4-amino-5-pyrazolone is obtained by treating 1-p-tolyl-2-ethyl-3-methyl-5-pyrazolone with acid and a nitrite and then reducing the resulting nitroso compound. 1-p- Ethoxyphenyl-2-ethyl-3-methyl-4-amino-5-pyrazolone is similarly prepared.
GB191215759D 1911-07-20 1912-07-05 Manufacture of omega-methylsulphites of Amino-substituted Pyrazolones. Expired GB191215759A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191215658X 1911-07-20
DE191215759X 1912-02-06

Publications (1)

Publication Number Publication Date
GB191215759A true GB191215759A (en) 1912-12-23

Family

ID=32909985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191215759D Expired GB191215759A (en) 1911-07-20 1912-07-05 Manufacture of omega-methylsulphites of Amino-substituted Pyrazolones.

Country Status (1)

Country Link
GB (1) GB191215759A (en)

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