Metal-catalyzed amination of organic sulfonates to organic amines
Patent 5817877 Issued on October 6, 1998. Estimated Expiration Date: 
September 19, 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.
September 19, 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 ReferencesPreparation of arylamines Patent #: 5576460 InventorsApplicationNo. 933658 filed on 09/19/1997US Classes:564/399, Of ether or alkylene oxide544/163, Cyano containing544/178, N-hydrocarbyl morpholines546/192, Additional ring containing546/205, The polycyclo ring system is bicyclo-carbocyclic558/422, The nitrogen is attached indirectly to a benzene ring by acyclic nonionic bonding564/396, Of carbonyl containing compound564/408Of hydrocarbonExaminersPrimary: Burn, Brian M.Attorney, Agent or FirmInternational ClassC07C 209/22AbstractA process of preparing an organic amine having at least one unsaturated group, such as an arylamine, involving contacting an unsaturated organic sulfonate, such as an aryl sulfonate, with a reactant amine, such as an alkyl or aryl amine, in the presence of a base and a transition metal catalyst under reaction conditions. The transition metal catalyst contains a Group 8 metal and a chelating ligand, for example a Group 15-substituted arylene or Group 15-substituted metallocene, such as 1,1'-bis(diphenylphosphino)-2,2'-binaphthyl or 1,1'-bis(diphenylphosphino)-ferrocene, respectively. The aryl sulfonate can be prepared from a phenol and sulfonating agent.Other References
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