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GR24371B - METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS. - Google Patents

METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS.

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Publication number
GR24371B
GR24371B GR610124371A GR610124371A GR24371B GR 24371 B GR24371 B GR 24371B GR 610124371 A GR610124371 A GR 610124371A GR 610124371 A GR610124371 A GR 610124371A GR 24371 B GR24371 B GR 24371B
Authority
GR
Greece
Prior art keywords
group
denotes
general formula
preparation
alkyl
Prior art date
Application number
GR610124371A
Other languages
Greek (el)
Original Assignee
Sandoz 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 Sandoz A.G. filed Critical Sandoz A.G.
Priority to GR610124371A priority Critical patent/GR24371B/en
Publication of GR24371B publication Critical patent/GR24371B/en

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  • Plural Heterocyclic Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

έθοδος διά την παρασκευήν νέων παραγώγων της πυραζολόνης, του γενικού τύπου (Ι) είς τον οποίον το R1 δηλοί μίαν κατωτέραν αλκυλικήν ομάδα, το R2 είναι έν άτομον υδρογόνου ή έν άτομον αλογόνου, και τοR3 δηλοί έν άτομον αλογόνου, μίαν κατωτέραν αλκυλικήν ομάδα ή αλκοξυ-ομάδα, ή μίαν νιτροομάδα, ή μέθοδος δε αύτη διακρίνεται έκ τούτου, ότι τα παραγωγα της Ν-αλκυλο-πιπεριδυλο-4-υδραζίνης, του γενικού τύπου (ΙΙ) είς τον οποίον το R1 έχει την ανωτέρωδοθείσαν σημασίαν, φέρομεν είς αντίδρασιν κατά γνωστάς μεθόδους μετά των β-κετοκαρβονικών οξέων ή των αλκυλικών εστέρν τούτων, του γενικού τύπου (ΙΙΙ) είς τον οποίον τα R2 και R3 έχουν την ανωτέρω δοθείσαν σημασίαν και το Χ δηλοί μίαν υδροξυλικήν ομάδα ή μίαν κατωτέραν αλκοξυ-ομάδα, τάς δέ ληφθείσας ενώσεις μετατρέπομεν ενδεχομένως είς τη διά προσθήκης οξέων άλατα τούτων. A process for the preparation of novel pyrazolone derivatives of general formula (I) wherein R1 denotes a lower alkyl group, R2 is a hydrogen atom or a halogen atom, and R3 denotes a halogen atom, a lower alkyl or alkyl group. a group, or a nitro group, and this method is therefore distinguished by the fact that the N-alkyl-piperidyl-4-hydrazine derivatives of general formula (II) in which R1 has the above significance are known to react methods after β-ketocarboxylic acids or alkyl esters thereof, of general formula (III) wherein R2 and R3 have the above significance and X denotes a hydroxyl group or a lower alkoxy group while the converted ones are converted; possibly in the addition of acid salts thereof.

GR610124371A 1961-04-20 1961-04-20 METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS. GR24371B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GR610124371A GR24371B (en) 1961-04-20 1961-04-20 METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR610124371A GR24371B (en) 1961-04-20 1961-04-20 METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS.

Publications (1)

Publication Number Publication Date
GR24371B true GR24371B (en) 1963-03-16

Family

ID=36864836

Family Applications (1)

Application Number Title Priority Date Filing Date
GR610124371A GR24371B (en) 1961-04-20 1961-04-20 METHOD FOR THE PREPARATION OF NEW HETEROCYCLIC COMPOUNDS.

Country Status (1)

Country Link
GR (1) GR24371B (en)

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