A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Safety of (1S,2S)-(-)-1,2-Diphenylethylenediamine, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article, authors is Jackowski, Olivier，once mentioned of 29841-69-8
(Chemical Equation Presented) Open wide and say AAA: The copper-free asymmetric allylic alkylation reaction of Crignard reagents, catalyzed by N-heter-ocyclic carbenes, is reported for allyl bromide derivatives. This reaction offers good enantioselectivity and good to excellent y regioselectivity, particularly for the formation of quaternary chiral centers (see scheme; Mes = mesityl).
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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI