Process for the preparation of alpha-pyrones

Details Process for the preparation of alpha-pyrones Process for the preparation of alpha-pyrones

1976-06-14

1978-09-12

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465R, 560 51, 562459, 562465, C07D30910

Patent

active

041137426

ABSTRACT:
A process for the preparation of tetrahydro-alpha-pyrones comprises preparing the alkyl ester of a 5-oxo alkanoic acid from a 4-oxo alkane carbonitrile, obtained in a first stage by the action of benzyl cyanide on the corresponding alkenone, and then saponifying the obtained ester, followed by hydrogenation and cyclization.

REFERENCES:
patent: 2770640 (1956-11-01), Journeay
patent: 2904581 (1959-09-01), Coraor et al.
patent: 3278557 (1966-10-01), Chibnik
patent: 3607885 (1971-09-01), Dombro
patent: 3624144 (1971-11-01), Wendler et al.
patent: 3644426 (1972-02-01), Dombro
patent: 3746751 (1973-07-01), Noguchi et al.
Darko, et al., J. Org. Chem. 32(7), 2352-2354 (1967)[cited as CA 67:43626j].

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