Process for conversion of cyanopyridines to nicotinamides...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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07345176

ABSTRACT:
The present invention relates to an improved process for conversion of cyanopyridines to nicotinamides. More particularly the present invention relates to preparation of nicotinamides and isonicotinamides which finds its usage in the preparation of anti-TB drug i.e. isoniazid and as an intermediate of vitamin B12. The present invention also relates to a process for a catalyst useful for the preparation of nicotinamide and isonicotinamide.

REFERENCES:
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patent: WO 96 16039 (1996-05-01), None
Breno et al., “Organometallic Chemistry, etc.” Organometallics 2003, 22, 1203-1211.
Hirayama et al., “Hydration of nitriles, etc.,” CA 120: 163480 (1993).
Ghaffar et al. I, “A New Homogeneous Platinum, etc.,” Tetrahedron Letters, 36 (47), oo 8657-8660 (1995).
Ghaffar et al. II, “The catalytic hydration, etc.,” Journal of Moleular Catalysis A: Chemical 160 (2000) 249-261.
Roy et al., “The catalyzed hydration, etc.,” Journal of the Indian Chemical Society (1988), 57(2), 195-8.
Misra et al., “Studies on the catalytic, etc.,” Journal of the Indian Chemical Society (1979), 56(2), 208-9.
Roy et al; “The Catalyzed Hydration of Nitriles to Amides”, Journal of the Indian Chemical Society (1980), 57(2), 195-8; XP-002251248.
Misra et al, “Studies on the Catalytic Hydration of Cyano Compounds to Amides,” Ranchi Univ., Ranchi, 834 008, India, Journal of the Indian Chemical Society (1979), 56(2), 208-9; XP-002251249.
STN Search, Chemical Abstract 126:347116, “Synthesis and ion exchange properties of various forms of manganese dioxide for cations of the I and II groups”, Bartos et al.
CA 103:76789 “Study of the activity and selectivity of a supported catalyst from oxides of metals of varying valence in the oxidative ammonolysis of 3-picoline”, vol. 103, p. 367, 1985.

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