Pyranone, process for its preparation, its use in the preparatio

Details Pyranone, process for its preparation, its use in the preparatio Pyranone, process for its preparation, its use in the preparatio

1990-08-13

1994-03-08

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546290, 549417, C07D21308, C07D21328, C07D31500

Patent

active

052928853

ABSTRACT:
2,3,5-(4H)-Trimethyl pyranone having the formula: ##STR1## which is prepared by acetylation of a ketone derived from 2-formyl-3-pentanone and preparation of 2,3,5-(1H)-trimethyl 4-pyridinone having the formula: ##STR2## by ammonolysis of the 2,3,5-(4H)-trimethyl 4-pyranone.

REFERENCES:
patent: 4171318 (1979-10-01), Chan et al.
patent: 4590299 (1986-05-01), La Mattina et al.
patent: 4603144 (1986-07-01), Campbell et al.
patent: 4705871 (1987-11-01), Masatera et al.
patent: 4876393 (1989-10-01), Heine et al.
Tetrahedron Letters No. 25, pp. 1939-1942, 1976, "Photoisomerization of 4-Pyrones, Nucleophilic Trapping of Reactive Intermediates".
Chemical and Engineering News, Jan. 30, 1989, p. 2.
E. Earl Royals and Kent C. Brannok, J.A.C.S., 75, p. 2050 (1952).
Shobha Mishra and R. D. Shrivastava, J. Ind. Chem. Soc., 1978, p. 1273.

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