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The reaction of imines with low-valent titanium species, generated in situ by using Ti(O i Pr) 4 /2 c-C 5 H 9 MgCl reagent, affords titanium–imine complex, which can couple with nitriles to provide 2,5-diazatitanacyclopentenes. α-Aminoketones are obtained in good yields by quenching the corresponding 2,5-diazatitanacyclopentenes with aqueous HCl solution. However, when...
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