Pyrazine preparation

Details Pyrazine preparation Pyrazine preparation

1992-09-29

1994-04-19

Tsang, Cecilia

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544405, C07D24102, C07D40506

Patent

active

053046480

ABSTRACT:
Pryrazine compounds are obtained by reacting ammonium ions, an aldehyde, and a 1-hydroxy-2-ketone by heating and refluxing an aqueous medium containing the same wherein at least the ketone is introduced dropwise to obtain a reaction medium containing pyrazine compounds, and after which, the pyrazine compounds are isolated from the reaction medium.

REFERENCES:
patent: 3925378 (1975-12-01), Voges et al.
patent: 4046763 (1977-09-01), Schwartz et al.
patent: 4097478 (1978-06-01), Sato
patent: 4755514 (1988-07-01), Ohta
patent: 4788289 (1988-11-01), Su et al.
patent: 4855431 (1989-08-01), Chang et al.
An English Language Disclosure of Yokota, et al., Japanese Kokai 52-97983 (1977).
An English Language Disclosure of Kosuge, et al., Japanese Kokai 52-97983 (1977).
Chiu et al., "Substitution of Pyrazines by Aldehydes in Model Systems", J. Agric. Food Chem., 38, (1990).

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