Synthesis of process related Dapsone impurities : Selective diazotization of aromatic di-amine

Volume 7, Issue 2, April 2022     |     PP. 33-41      |     PDF (216 K)    |     Pub. Date: April 17, 2022
DOI: 10.54647/chemistry15253    91 Downloads     103099 Views  

Author(s)

Mahesh Bandishti, API R&D Centre, Emcure Pharmaceuticals Ltd., ITBT Park, Phase-II, MIDC, Hinjewadi, Pune-411057, India
Balaji Chaugule, API R&D Centre, Emcure Pharmaceuticals Ltd., ITBT Park, Phase-II, MIDC, Hinjewadi, Pune-411057, India
Chinmoy Pramanik, API R&D Centre, Emcure Pharmaceuticals Ltd., ITBT Park, Phase-II, MIDC, Hinjewadi, Pune-411057, India
Ganesh Karhade, API R&D Centre, Emcure Pharmaceuticals Ltd., ITBT Park, Phase-II, MIDC, Hinjewadi, Pune-411057, India
Ashok Chaudhari, API R&D Centre, Emcure Pharmaceuticals Ltd., ITBT Park, Phase-II, MIDC, Hinjewadi, Pune-411057, India

Abstract
Process related two impurities of Dapsone were synthesized by applying cu-catalyzed conversions for the impurity profile and toxicological study. Controlled mono-diazotization of Dapsone followed by insitu iodination is the key step of our synthesis.

Keywords
Non-aqueous diazotization, Ullmann reactions, Process related impurities, Impurity Profile, Isoamyl nitrite and Hydroxylation.

Cite this paper
Mahesh Bandishti, Balaji Chaugule, Chinmoy Pramanik, Ganesh Karhade, Ashok Chaudhari, Synthesis of process related Dapsone impurities : Selective diazotization of aromatic di-amine , SCIREA Journal of Chemistry. Volume 7, Issue 2, April 2022 | PP. 33-41. 10.54647/chemistry15253

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