Binaphthyl-based primary amine

Lately, Maruoka, et al. reported an organocatalytic Diels-Alder reaction of a-substimted a,p-unsaturated aldehydes with cyclopentadiene, Scheme 3.16 [29], Usually, the organocatalytic Diels-Alder reactions were not applicable to a-substi-tuted acroleins due to serious steric repulsion between the substituent of aldehyde and the secondary amine catalyst. A binaphthyl-based primary amine, catalyst 49, was designed for the reaction, and a plausible mechanism for the stereoselectivity reaction was presented. 

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