Abstract
AbstractPhosphothreonine (pThr) was found to constitute a new class of chiral phosphoric acid (CPA) catalyst upon insertion into peptides. To demonstrate the potential of these phosphopeptides as asymmetric catalysts, enantioselective transfer hydrogenations of a previously underexplored substrate class for CPA‐catalyzed reductions were carried out. pThr‐containing peptides lead to the observation of enantioselectivities of up to 94:6 e.r. with 2‐substituted quinolines containing C8‐amino functionality. NMR studies indicate that hydrogen‐bonding interactions promote strong complexation between substrates and a rigid β‐turn catalyst.
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