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US Patent 6204337 - Solid-phase synthesis of codeine from morphine
US Patent Issued on March 20, 2001
Estimated Patent Expiration Date:
September 3, 2019Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
September 3, 2019Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractThe specification describes a methylation resin comprising methyl(dialkyl)anilinium salts or methyl(diaryl)anilinium salts covalently bonded to the resin. The methylation resin is used in the solid-phase synthesis of codeine from morphine. Accordingly, the specification describes a process for methylating morphine to form codeine by loading morphine onto a methylation resin comprising methyl(dialkyl)anilinium salts or methyl(diaryl)anilinium salts covalently bonded to the resin; contacting the loaded resin with sufficient hydrocarbon or ether solvent to cover the loaded resin; and heating the loaded resin in the hydrocarbon or ether solvent under sufficient conditions to form codeine. The methylating resin may be used to methylate phenolic moieties on other compounds and to esterify compounds containing carboxylic acid moieties.Other References
| InventorsAssigneeApplicationNo. 390285 filed on 09/03/1999US Classes:525/332.2, Divinyl benzene525/379, Organic amine526/336, Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.546/44One of the five cyclos is five-membered and includes ring chalcogen (e.g., codeine, morphine, etc.)Field of Search546/44, One of the five cyclos is five-membered and includes ring chalcogen (e.g., codeine, morphine, etc.)526/336, Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.525/332.2, Divinyl benzene525/379, Organic amine525/191, Polymer mixture of two or more solid polymers derived from ethylenically unsaturated reactants only; or mixtures of said polymer mixture with a chemical treating agent; or products or processes of preparing any of the above mixtures525/241, Solid polymer derived from an aromatic hydrocarbon reactant525/242Polymer derived from ethylenic reactants only mixed with ethylenic reactantExaminersPrimary: Rotman, Alan L.Attorney, Agent or FirmUS Patent References2874132, 3817878, 4130515, Lignin-based composition board binder comprising a copolymer of a lignosulfonate, melamine and an aldehydeIssued on: 12/19/1978 Inventor: Bornstein4207398, Process for preparing physically stable quaternary ammonium anion exchange resins by chloromethylation and amination in the absence of additional organic solvent Issued on: 06/10/1980 Inventor: Riener4284758, Glyoxal/cyclic urea condensates Issued on: 08/18/1981 Inventor: North4285758, Bonding apparatus for thermoplastic coated materials Issued on: 08/25/1981 Inventor: Clausen , et al.4300898, Compositions for treating textile fabrics Issued on: 11/17/1981 Inventor: North4345063, Glyoxal/cyclic urea condensates Issued on: 08/17/1982 Inventor: North4764615, Process for the preparation of codeine from morphine Issued on: 08/16/1988 Inventor: Ayyangar , et al.5670550, Ion exchange polymers for anion separations Issued on: 09/23/1997 Inventor: Jarvinen, et al.5981750Solid-phase synthesis of codeine from morphine Issued on: 11/09/1999 Inventor: Corcoran, et al. International ClassesC08F 008/30C08F 008/32 C08F 012/36 C08F 112/36 |
