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公开(公告)号:US20080293970A1
公开(公告)日:2008-11-27
申请号:US11630760
申请日:2004-07-07
IPC分类号: C07C211/09
CPC分类号: C07C315/04 , C07C315/02 , C07C317/34
摘要: A new process for the preparation and purification of 4-4′-diamino-diphenyl-sulfone (dapsone) is described. The process described is a three step process comprising a condensation reaction with the synthesis of a thioeter intermediate and then steps of oxidation and reduction in suitable conditions in order to obtain a product with good yield and purity.
摘要翻译: 描述了制备和纯化4-4'-二氨基 - 二苯基砜(氨苯砜)的新方法。 所述方法是三步法,其包括与合成硫代特异中间体的缩合反应,然后在合适的条件下进行氧化和还原的步骤,以获得具有良好产率和纯度的产物。
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公开(公告)号:US07531694B2
公开(公告)日:2009-05-12
申请号:US11630760
申请日:2004-07-07
IPC分类号: C07C317/14
CPC分类号: C07C315/04 , C07C315/02 , C07C317/34
摘要: A new process for the preparation and purification of 4-4′-diamino-diphenyl-sulfone (dapsone) is described. The process described is a three step process comprising a condensation reaction with the synthesis of a thioether intermediate and then steps of oxidation and reduction in suitable conditions in order to obtain a product with good yield and purity.
摘要翻译: 描述了制备和纯化4-4'-二氨基 - 二苯基砜(氨苯砜)的新方法。 所述方法是三步法,其包括与合成硫醚中间体的缩合反应,然后在合适的条件下进行氧化和还原的步骤,以获得具有良好产率和纯度的产物。
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