Process for the preparation of a pharmacologically active substance
Patent 6180793 Issued on January 30, 2001. Estimated Expiration Date: 
November 12, 2019. 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.
November 12, 2019. 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 ReferencesDextro-rotatory enantiomer of methyl alpha-5 (4,5,6,7-tetrahydro (3,2-c) thieno pyridyl) (2-chlorophenyl)-acetate and the pharmaceutical compositions containing it Patent #: 4847265 InventorsAssigneeApplicationNo. 423549 filed on 11/12/1999US Classes:546/114, Ring sulfur in the bicyclo ring system549/77Unsaturated carbocyclic ring or acyclic carbon to carbon unsaturation containingExaminersPrimary: Dentz, BernardAttorney, Agent or FirmForeign Patent References
International ClassC07D 493/04Foreign Application Priority Data1997-05-13 HUAbstractThe present invention relates to a process for the preparation of the racemic or optically active compounds of general formula (VI): ##STR1##wherein the meaning of X is a halogen atom, or their salts, characterized in that, a racemic or optically active new compound of general formula (VII): ##STR2##wherein the meaning of X is a halogen atom, is transformed into the racemic or optically active compound of general formula (VIII): ##STR3##Field of SearchRing sulfur in the bicyclo ring system |
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