GR14866B - METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS. - Google Patents

METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS.

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Publication number
GR14866B
GR14866B GR530114866A GR530114866A GR14866B GR 14866 B GR14866 B GR 14866B GR 530114866 A GR530114866 A GR 530114866A GR 530114866 A GR530114866 A GR 530114866A GR 14866 B GR14866 B GR 14866B
Authority
GR
Greece
Prior art keywords
hydrogen
general formula
tetrahydropyridions
alkylumed
manufacturing
Prior art date
Application number
GR530114866A
Other languages
Greek (el)
Original Assignee
F. Hoffmann - La Roche & Co 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 F. Hoffmann - La Roche & Co A.G. filed Critical F. Hoffmann - La Roche & Co A.G.
Priority to GR530114866A priority Critical patent/GR14866B/en
Publication of GR14866B publication Critical patent/GR14866B/en

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Abstract

έθοδος δια την παρασκευήν αλκυλιωμένου τετραϋδροπυριδιονών του γενικού τύπου: [*] ένθα το R1 είναι υδρογόνον ή εν υπόλοιπον μεθυλίου και τα R2 και R3είναι κατώτερα υπόλοιπα αλκυλίου, διακρινομένη εκτούτου, ότι μίαν τετραϋδροπυριδιόνην του γενικού τύπου: [*] ένθα R1 είναι υδρογόνον ή υπόλοιπον μεθυλίου και τα R2 και R3 είναι υπόλοιπα κατωτέρων, κεκορεσμένων ή ακορέστων αλειφατικών υδρογονανθράκων, φέρομεν εις αντίδρασιν μετά μορμαλδεϋδης παρουσία ενός ουδετέρου άλατος του θειώδους οξέος εις συνήθη ή ελαφρώς υψωμένην θερμοκρασίν εν υδατικώ διαλύματι, και την παραγομένην 5-οξυμεθυλοένωσιν υποβάλλομεν εις μερικήν υδρογόνωσιν δια καταλυτικής οδού μέχρι της προσλήψεως της δια την υδρογονολυτικήν μετατροπήν της οξυμεθυλομάδος εις μίαν μεθυλομάδα και δια τον κορεσμόν ενδεχομένων ακορέστων 3 υποκαταστατών απαιτουμένης ποσότητος υδρογόνου. Process for the preparation of alkylated tetrahydropyridones of general formula: [*] wherein R1 is hydrogen or methyl residue and R2 and R3 are lower alkyl moieties, characterized in that a tetrahydropyridione of the general formula: [*] wherein R1 is hydrogen or methyl residue and R2 and R3 are residues of lower, saturated or unsaturated aliphatic hydrocarbons, reacted with formaldehyde in the presence of a neutral salt of sulfuric acid at a normal or slightly elevated temperature; subjected to partial hydrogenation by catalytic route until uptake for the hydrogenolytic conversion of the oxymethyl group to a methyl group and to the saturation of any unsaturated 3 substituents of the required amount of hydrogen.

GR530114866A 1953-04-21 1953-04-21 METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS. GR14866B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GR530114866A GR14866B (en) 1953-04-21 1953-04-21 METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR530114866A GR14866B (en) 1953-04-21 1953-04-21 METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS.

Publications (1)

Publication Number Publication Date
GR14866B true GR14866B (en) 1953-12-05

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ID=36837094

Family Applications (1)

Application Number Title Priority Date Filing Date
GR530114866A GR14866B (en) 1953-04-21 1953-04-21 METHOD OF MANUFACTURING ALKYLUMED TETRAHYDROPYRIDIONS.

Country Status (1)

Country Link
GR (1) GR14866B (en)

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