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À propos de : Selective Amidation of 2,6-Dihalogenopurines: Application to the Synthesis of New2,6,9-Trisubstituted Purines        

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  • Selective Amidation of 2,6-Dihalogenopurines: Application to the Synthesis of New2,6,9-Trisubstituted Purines
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  • We report herein the palladium(0)/Xantphos-catalyzed cross-coupling of various amides with 2,6-dihalogenopurines, withsubstituent-dependent regioselectivity. Furthermore, subjecting the same 2,6-dihalogenopurines to SNAr conditions withamide/NaH in DMF leads to inverted regioselectivity albeitin lower yield. These methodologies allow the two-stepsynthesis of new 2,6,9-trisubstituted purines from readilyavailable 2,6-dihalogenopurines.
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