Organic compounds -- part of the class 532-570 series – Organic compounds – Unsubstituted hydrocarbyl chain between the ring and the -c-...
Patent
1994-02-01
1997-03-04
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Unsubstituted hydrocarbyl chain between the ring and the -c-...
540456, 540467, 540468, 540469, 549 11, 549348, 549351, 549352, 549353, C07D26722, C07D32300, C07D32112
Patent
active
056080581
ABSTRACT:
A process of preparing a purified crown compound is disclosed which comprises the steps of (a) dissolving a crown compound and a salt in an organic solvent to form a solution of a complex salt of a crown compound; (b) filtering the solution to obtain a filtrate; (c) adding water to the filtrate to produce a precipitate; and (d) filtering out the produced precipitate.
REFERENCES:
Chemical Abstracts, vol. 117, No. 28, 1992, Columbus, Ohio, US; abstract No. 90337b, p. 789, col. 1.
Chemical Abstracts, vol. 101, No. 7, 1984, Columbus, Ohio, US; abstract No. 55121z, p. 626; col. 2.
European Search Report, completed May 17, 1994 by Examiner J. Francois at The Hague.
Kawashima Yasuhiko
Tanaka Shinri
Covington Raymond
Ivy C. Warren
Konica Corporation
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