Nitration of pyridine-2, 6-diamines

Details Nitration of pyridine-2, 6-diamines Nitration of pyridine-2, 6-diamines

1998-03-12

1999-08-31

Davis, Zinna Northington

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21302

Patent

active

059455373

ABSTRACT:
It has been found that the nitration of pyridine-2,6-diamines, which is commonly performed in a mixture of nitric acid and concentrated sulfuric acid, will give a significantly higher yield (from about 50% up to more than 90%) if the reaction is carried out in a mixture of nitric acid and oleum, or by otherwise providing an inherently anhydrous medium.

REFERENCES:
patent: 4310671 (1982-01-01), Boudakian
patent: 4560800 (1985-12-01), Bakshi et al.
Derwent Patent Abstract No. 94-290874/36 (1994).
R.L. Williams et al., "The Chemistry of Aryltetraamines. II. The Synthesis of 2,3,5,6-Tetraaminopyridine", J. Heterocyclic Chem., 8 (Oct. 1971), pp. 841-843.
H. Ritter et al., "Synthesis and Reactions of Dinitrated Amino and Diaminopyridines", J. Heterocyclic Chem., 32 (Mar.-Apr. 1995), pp. 585-590.
H.-H. Licht et al., "Novel Explosives: Dinitropyridines", Nit. Annu. Conf. ICT(1993), 24.sup.th (Energetic Materials: Insensitivity and Environmental Awareness), pp. 6/1-6/8.

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