N-unsubstituted amidinium salts

Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles

Reexamination Certificate

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53

Reexamination Certificate

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06841696

ABSTRACT:
The invention relates to N-unsubstituted imidic ester alkyl sulphates, N-unsubstituted amidinium alkyl sulphates and a process for their preparation, which is characterized in that carboxamides are converted with sulphuric diesters into the corresponding imidic ester alkyl sulphates, which are reacted further with ammonia to give the analogous amidinium alkyl sulphates.

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Lawrence A. Reiter: “Synthesis of 2-Substituted 5-Acetyl-1-(H)-imidazoles via 3-Chloro-4,4-Dimethoxy-2-butanone and Related 3,4-Disubstituted 3-Buten-2-ones” J. Org. Chem. Bd. 49, Nr. 19, 1984, Seiten 3494-3498, XP002262682 *Schema 1, Tabelle 1*.
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Kantlehner, Willi et al: “Study of the effectiveness of various 1-(dialkylamino)-1-methoxycar-benium methyl sulfates for acetalization” Liebigs Annalen Der Chemie, Bd. 2, 1980, Seiten 246-252, XP009009050 *Vebindung 5d* *Seite 247; Tabelle*.
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Crossland, I. et al: “A Convenient Preparation of Acetamidine” Acta Chem. Scand., 1981, Seite 605 XP009009009 *das ganze Dokument*.
Norrestam, R.: “Structure of Bis(acetamidinium) Carbonate Monohydrate, 2(C2H7N2+) .C032-H20, at 108 K” Acta Cryst., Bd. C40, 1984, Seiten 297-299, XP009009008 *Zusammenfassung*.

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