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A Reactivity Test for HBTU-Activated Carboxylic Acids with Low Reactivity and Competitive Coupling of N-Methylpyrrole Derivatives

Tobias Ernst, Clemens Richert*
Institute for Organic Chemistry, University of Karlsruhe (TH), 76131 Karlsruhe, Germany
Fax: +49(721)6084825; e-Mail: cr@rrg.uka.de;