141-86-6Relevant articles and documents
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Bergstrom et al.
, p. 239,242 (1946)
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Shreve et al.
, p. 173,176 (1940)
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Acid-catalyzed N-debenzylation of benzylaminopyridines
Kowalski,Majka,Kowalska
, p. 740 - 741 (1998)
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Nitration method for preparing 2, 6-diamido-3, 5-binitro pyridine by ultrafine zeolite-based micro-channel reaction
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Page/Page column 6-9, (2019/03/08)
The invention provides a nitration method for preparing 2, 6-diamido-3, 5-binitro pyridine by ultrafine zeolite-based micro-channel reaction. The nitration method includes the steps: heating and uniformly mixing crushed sodium amide, decahydronaphthalene and p-toluidine, performing microwave heating reaction on mixture and pyridine by a Y-shaped micro-channel reactor, and filtering and recrystallizing the mixture and the pyridine to obtain 2, 6-diamido pyridine; blowing ultrafine HZSM-5 catalysts into an outlet channel of the Y-shaped micro-channel reactor, placing the modified Y-shaped micro-channel reactor into an ice-water bath, leading the 2, 6-diamido pyridine and dichloromethane solution containing nitrogen pentoxide into the Y-shaped micro-channel reactor, accelerating flow and rapidly increasing temperature to reach reaction temperature to obtain a 2, 6-diamido-3, 5-binitro pyridine crude product; secondarily recrystallizing, filtering and drying the 2, 6-diamido-3, 5-binitro pyridine crude product, adding the crude product into distilled water, boiling the distilled water and performing dimethyl sulfoxide secondary crystallization to obtain the 2, 6-diamido-3, 5-binitro pyridine with high yield and purity.
PROCESS FOR THE SYNTHESIS OF DIAMINOPYRIDINES FROM GLUTARONITRILES
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Page/Page column 5, (2010/03/02)
A liquid-phase process is provided for the manufacture from glutaronitriles and related compounds of 2,6-diaminopyridine and related compounds, which are used industrially as compounds and as components in the synthesis of a variety of useful materials. The synthesis proceeds by means of a dehydrogenative aromatization process.