Question

Complete the mechanism of the reaction between benzaldehyde and dimethylamine in acid followed by introduction of a hydride reducing agent. Add any missing atoms, bonds, charges, nonbonding electron pairs, and curved arrows. Note the use of a generic base B:, which represents another amine in solution that acts as a shuttle for the added acid

Continued

Answer 1

The curved arrow mechanism for the protonation of benzaldehyde is as follows O: benzaldehyde The curved arrow mechanism for the nucleophile dimethylamine group attacks on the electrophilic carbon of the carbonyl group is as follows: CH3 CH3 CH3 O: 0%

The curved arrow mechanism for the acid-base reaction is as follows: CH3 CH3 CH3 CH3 O: O: +BH Base The curved arrow mechanism for the protonation is as follows

Ht CH3 CH3 CH3 CH3 arrow mechanism for the loss of water is as follows: The curved CH3 CH3 Нас CH3

The curved arrow mechanism for attacking of hydride ion to the electrophilic carbon is as follows CH3 H3C CH3