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The development of rapid and bioorthogonal chemical reactions has expanded greatly the utility of bioconjugation chemistry in the service of site-selective protein labeling, even allowing molecular imaging in live cells or animals. âClickâ chemistry is particularly desirable due to its fast...
Improved Gram-Scale Procedure for MIBA-Catalyzed Direct Amidation and Its Application to the Preparation of alpha and beta PeptidesDownload
Direct condensation between a carboxylic acid and amine must overcome the initial formation of a thermodynamically stable and unreactive carboxylate-ammonium salt, providing the amide product only at very high temperatures (over 160 oC) that are incompatible with many functionalized molecules....