Abstract
α‐Iminopyridine (α‐IP) is an important redox‐noninnocent ligand. The substituents on the imino function of α‐IPs have important impact on the reaction selectivity with diethylzinc. For the α‐IPs with a hydrogen substituent on the imino carbon, reduction occurred for the non‐bulky N‐substituents phenyl and 2‐methylphenyl groups, whereas alkyl addition and coupling reactions can be selectively achieved for the sterically bulky N‐substituents 2,6‐dimethylphenyl or 2,4,6‐trimethylphenyl group. However, for the α‐IPs with a CH3 substituent on the imino carbon, the deprotonation reaction happened regardless of the N‐substituents of 2‐methylphenyl or 2,6‐dimethylphenyl group. All the products were isolated and characterized by single‐crystal X‐ray diffraction. The possible mechanisms of these reactions were also discussed.
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