Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-10-18
1981-01-20
Chan, Nicky
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
2603459R, C07D30906
Patent
active
042461782
ABSTRACT:
A novel class of tetrahydropyran-5-one compounds are provided which are 2-alkoxy- or 2-acyloxy-3,4-dihalogeno-6-alkyl tetrahydropyran-5-ones expressed by the general formula ##STR1## where R.sup.1 is an alkyl group, R.sup.2 is an alkyl or an acyloxy group and X is a halogen atom. The compounds are synthesized by the reaction of a 2-furyl carbinol compound with a halogen in the presence of an alcohol or a carboxylic acid. The compounds are useful as an intermediate for the synthetic preparation of various useful compounds including maltol as a flavor.
REFERENCES:
patent: 4059595 (1977-11-01), Shono et al.
patent: 4082717 (1978-04-01), Brennan et al.
patent: 4126624 (1978-11-01), Brennan et al.
patent: 4150039 (1979-04-01), Harima et al.
Shono et al., Tetrahedron Letters, No. 17, 1363 (1976).
Torii et al., Chemistry Letters, vol. 5, 495 (1976).
Hayashida Akira
Ishihara Toshinobu
Taguchi Kenichi
Yamamoto Akira
Chan Nicky
Shin-Etsu Chemical Co. , Ltd.
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