Liquid phase process for the synthesis of annulated...

Details Liquid phase process for the synthesis of annulated... Liquid phase process for the synthesis of annulated...

2004-12-30

2009-02-17

Andres, Janet L (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07491828

ABSTRACT:
The present invention relates to a process for producing annulated pyridines by reacting cyclic ketone, aldehyde and ammonia in presence of molecular sieve type catalysts in an environmentally friendly, economical and highly selective heterogeneous method.

REFERENCES:
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patent: WO 02/079166 (2002-10-01), None
Kulkarni et al., Studies in surface science and catalysis, 2004, 154C, pp. 2781-2787.
Tchitchibabin: “Sur les reactions de condensation des aldehydes et cetones avec l'ammoniaque en bases pyridiques. Condensations avec les cetones cycliques” Bull. Soc. Chim. Fr., vol. 6, 1939, pp. 522-533, SP09052662, p. 524.
International Search Report for PCT/IN2004/000442, dated Aug. 30, 2005.
Thummel, Randolph P., et al., “Preparation and Properties of Annelated Pyridines”, J. Org. Chem., 1977, vol. 42, No. 16, pp. 2742-2747.

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