Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran

Details Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran

1984-05-23

1987-03-03

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260705, C07D30786

Patent

active

046476768

ABSTRACT:
A process for the isolation of a dihydroxybenzenemonoether from a reaction mixture containing solvent, ether and unreacted dihydroxybenzene, comprising contacting the reaction mixture with at least one hydrocarbon which is not miscible or only partially miscible with the reaction mixture, the ether selectively entering the hydrocarbon. Advantageously the reaction for the preparation of the monoether is carried out in an alcohol, a ketone, a dipolar aprotic solvent or a polyhydroxyalkyl ether, or a mixture thereof with water, the hydrocarbon used as extracting agent has a boiling point between about 80.degree. and 300.degree. C., and the extraction is carried out in the presence of water whereby there is an increase in the selectivity of the extraction.

REFERENCES:
patent: 4297284 (1981-10-01), Michelet
patent: 4321204 (1982-03-01), Buttner et al.
patent: 4380654 (1983-04-01), Franko-Filipassic et al.

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