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The catalytic activity and enantioselectivity of chiral 2,3-dihydroimidazo[1,2-a]pyridine (DHIP) derivatives was examined as a function of the steric environment of the nucleophilic nitrogen and the electronic properties of the pyridine ring. 2-Phenyl-6-trifluoromethyl-DHIP (CF 3 -PIP) was confirmed to be the best catalyst in this series. In addition, three second-generation catalysts derived...
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