Thionation process and a thionating agent
AssigneeVironova Thionation AB
InventorsBirgitta Pettersson, Vedran Hasimbegovic, Per H Svensson, Jan Bergman
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Abstract
A process for transforming a group >C═O (I) in a compound into a group >C═S (II) or into a tautomeric form of group (II) in a reaction giving a thionated reaction product, by use of crystalline P2S5.2 C5H5N as a thionating agent. A thionating agent which is crystalline P2S5.2 C5H5N.
Claims20
A process for transforming a group >C═O (I) in a compound into a group >C═S (II) or into a tautomeric form of group (II) in a reaction giving a thionated reaction product, by use of crystalline P2S5.2 C5H5N as a thionating agent, said thionating agent having been separated from a pyridine mother liquor, and said thionating agent having a melting point of 167° C. to 169° C.
A process wherein, in a compound comprising several carbonyl groups >C═O (I), more than one carbonyl group (I) are thionated to provide more than one group >C═S (II) or tautomeric form of group (II), by use of crystalline P2S5.2 C5H5N as a thionating agent, said thionating agent having a melting point of 167° C. to 169° C., wherein the thionating agent and the compound are allowed to react with each other in a liquid solvent medium for the compound and for the thionating agent.
A process wherein, in a compound comprising several carbonyl groups >C═O (I), only one carbonyl group (I) is thionated to provide a group >C═S (II) or a tautomeric forms of group (II), by use of crystalline P2S5.2 C5H5N as a thionating agent, said thionating agent having a melting point of 167° C. to 169° C., wherein the thionating agent and the compound are allowed to react with each other in a liquid solvent medium for the compound and for the thionating agent.
Dependencies are inferred from the claim text.