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The presence of C–H⋯O hydrogen bonds in a complex composed of 2-(acrylamido)-6-(methylamido) pyridine and 1-octyl thymine is demonstrated by 1 H, 13 C NMR study and X-ray analysis. Further titration experiment shows these weak C–H⋯O hydrogen bonds will affect the binding constants through a geometric effect compared with other structural analogous systems.
A total synthesis of (+)-curacin A 1 which features a facile and selective thioacylation of the polyene amino-alcohol 2 with the benzotriazole-derived cyclopropyl thioamide 3, leading to 15, as a key step is described.
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