Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1980-04-07
1981-10-13
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
C07D27902
Patent
active
042949610
ABSTRACT:
Certain benzothiazine compounds, metal complexes thereof and solutions of said compounds in essentially water-immiscible, liquid hydrocarbon solvents are disclosed. These compounds have in their 4-keto form, the structure: ##STR1## the corresponding enol of which has the structure: ##STR2## wherein x, n, R.sup.1, R.sup.2 and R.sup.3 are as defined in the specification and claims hereof. Particular metal values are recovered from their aqueous solutions by using the benzothiazine compounds dissolved in essentially water-immiscible, liquid hydrocarbon solvents. The extraction process involves contacting the metal value containing aqueous solution with the solution of the benzothiazine in essentially water-immiscible, liquid hydrocarbon solvent and stripping the metal from the loaded organic phase.
REFERENCES:
patent: 3284450 (1966-11-01), Kraaijeveld et al.
patent: 3346572 (1967-10-01), Shavel et al.
patent: 3966716 (1976-06-01), Kaminsky
J. von Braun, Chem. Ber., vol. 56, pp. 2332-2343 (1923).
Abe, J. Pharm. Soc., Japan, vol. 76, pp. 1058-1063 (1956).
Abe, Chem. Abstracts, vol. 51, entry 3499e (1957).
Zinnes et al., J. Org. Chem., vol. 30, pp. 2241-2246 (1965).
Rasmussen, J. Org. Chem., vol. 39, pp. 1554-1560 (1974).
Abed, Jour. Indian Jour. of Chem., vol. 14B, pp. 428-429 (1976).
M. von Strandtmann et al., J. Hetero. Chem., vol. 9, pp. 171-172 (1972).
Lombardino et al., Jour. of Medicinal Chemistry, vol. 14, pp. 1171-1175 (1971).
Ford John M.
Henkel Corporation
Span Patrick J.
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