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À propos de : An Efficient Highly Regioselective Synthesis of 2,3,4-TrisubstitutedPyrroles by Cycloaddition of Polarized Ketene S,S- and N,S-Acetalswith Activated Methylene Isocyanides        

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  • An Efficient Highly Regioselective Synthesis of 2,3,4-TrisubstitutedPyrroles by Cycloaddition of Polarized Ketene S,S- and N,S-Acetalswith Activated Methylene Isocyanides
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  • An efficient route for regioselective synthesis of 2,3,4- substituted pyrroles allowing precise control overthe introduction of a number of substituents and functionalities (tosyl, carbalkoxy, aryl, cyano, nitro,acetyl, benzoyl, cyclic amines, etc.) at the three positions of the pyrrole ring has been developed via1,3-dipolar cycloaddition of readily accessible polarized ketene S,S- and N,S-acetals with carbanionsderived from activated methylene isocyanides.
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