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A) Depiction of DIPPnacnac‐MgnBu precatalyst; B) Depiction of (DIPPnacnac‐CaH⋅THF)2 precatalyst; C) 1‐Li‐2‐tert‐butyl‐1,2‐dihydropyridine unit; D) Molecular structure of 1tLi⋅Me4AEE with all H atoms other than that bonded to the dihydropyridyl sp3 C atom omitted for clarity.7b
