Process to prepare tolterodine
Patent 5922914 Issued on July 13, 1999. Estimated Expiration Date: 
December 18, 2017. 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.
December 18, 2017. 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 5382600 Condensed heterocyclic compounds, their production and use Patent #: 5482967 InventorsAssigneeApplicationNo. 993257 filed on 12/18/1997US Classes:564/413, Preparing directly from hetero ring containing compound549/399, Chalcogen bonded directly to the hetero ring564/395Preparing directly by aminationExaminersPrimary: Burn, Brian M.Attorney, Agent or FirmInternational ClassC07C 209/02AbstractDisclosed is a novel intermediate, 3,4-dihydro-6-methyl-4-phenyl-2H-benzopyran-2-ol (IV) ##STR1## and an improved process for the preparation of tolterodine.Other References
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