Optically active salt of protected D-penicillamine and L-lysine
Patent 3980665 Issued on September 14, 1976. Estimated Expiration Date: 
September 14, 1993. Estimated 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.
September 14, 1993. Estimated 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.Patent References 2450784 2539854 2865928 3845110 InventorsAssigneeApplicationNo. 05/436743 filed on 01/25/1974US Classes:548/147, Spiro548/188, The -C(=X)- group is bonded directly to the thiazole ring548/201, The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens548/479, The chalcogen, X, is in a -C(=X)- group (e.g., beta - phthalimidopropionaldehyde, etc.)558/254, Nitrogen bonded directly to the -C(=X)- group558/255, The -C(=X)- group is part of a -COO- group560/307, Esters having the -S(=O)(=O)-S- group, wherein the divalent sulfur is bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon (e.g., thiolsulfonate esters, etc.)562/401, Racemization or separation of optical isomers562/426, Sulfur562/557, Alpha N, beta S - acids or salts thereof562/558Penicillamine per se or salt thereofExaminersPrimary: Gallagher, Richard J.Attorney, Agent or FirmInternational ClassesC07D 277/00 (20060101)C07D 277/06 (20060101) Foreign Application Priority Data1973-01-27 DTAbstractD,L-penicillamine is converted to D-penicillamine with the aid of L-lysine.Other References
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