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Pyrrole derivativesR 0120 Counterion Effects in a Gold-Catalyzed Synthesis of Pyrroles from Alkynyl Aziri-

dines. — Depending on the counterion of the silver salt and/or the solvent, 2,4- or 2,5-substituted pyrroles are formed as major or exclusive products. — (DAVIES*, P. W.; MARTIN, N.; Org. Lett. 11 (2009) 11, 2293-2296; Sch. Chem., Univ. Birmingham, Edgbaston, Birmingham B15 2TT, UK; Eng.) — R. Simon

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