Process for the production of substituted furans

Details Process for the production of substituted furans Process for the production of substituted furans

1978-11-24

1980-07-29

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603478, C07D30746, C07D30768

Patent

active

042150574

ABSTRACT:
A process for the production of substituted furans of the general formula ##STR1## wherein R is a member of the group consisting of alkoxy radicals having from 1-6 C-atoms, a substituted aryloxy radical, an unsubstituted aryloxy radical and an alkyl radical, R.sub.1 is a alkyl or aryl radical with 1-6 C-atoms, preferably methyl, R.sub.2 and/or R.sub.3 is an alkyl radical with 1-6 C-atoms or hydrogen by reacting a .beta.-dicarbonyl compound with an .alpha.-chlorocarbonyl compound in the presence of a compound capable of combining with the hydrochloric acid formed, at temperatures between 30.degree. and 100.degree. C., the reaction being carried out at pH values between 2 and 7, preferably between 3.5 and 6, with the addition of equimolar amounts of an alkaline earth carbonate.

REFERENCES:
patent: 4025537 (1977-05-01), Kretchmer et al.
Bisagni et al., Bull. Soc. Chim. France, (8) (1967), pp. 2796-2800.
Valenta et al., Coll. Czech. Chem. Comm., vol. 31, No. 6 (1966), pp. 2413 and 2414.
Elderfield, Heterocyclic Compounds, vol. 1, J. Wiley, New York (1950), pp. 132-134.
Scott et al., Journal of the American Chemical Society, vol. 54 (1932), pp. 2549-2556.
Bisagni et al., Bull. Soc. Chim. France, 1971 (II), pp. 4041-4047.

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