Abstract:The three-center-four-electron halogen bond (3c4e X-bond) presents a new design concept for catalysis. By integrating halogen(I) (X+: I+ or Br+), bis-pyridyl ligand NN, and non-nucleophilic counter anion Y. [N···X···N]SbF6, we developed non-metallic complex catalysts, [N···X···N]Ys, which exhibited outstanding activity and facilitated the Mukaiyama–Mannich-type reaction of N-heteroaromatics with sub-ppm-level catalyst loading. The high activity of [N···X···N]SbF6 was clearly demonstrated. NMR titration experim… Show more
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