Zirconium catalysts sparkle: A new chiral zirconium complex has been used to catalyze hydroamination reactions to cyclize aminopentenes into 2-methylpyrrolidines (see scheme). The rate law supports a mechanism involving a reversible substrate–catalyst interaction that precedes the rate-determining step. A new mechanism for zirconium-catalyzed hydroamination has been proposed based on kinetic isotope effects and the significant effect of isotopic substitution on enantioselectivity.
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Manna et al. (2011) studied this question.
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