Chapter 24, Problem 24.8P

Draw the products formed in the crossed aldol reaction of phenylacetaldehyde $\left({\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{CH}}_{\text{2}}\text{CHO}\right)$ with each compound: (a) ${\text{CH}}_{\text{2}}{\left(\text{COOEt}\right)}_{\text{2}}$; (b) ${\text{CH}}_{\text{2}}{\left({\text{COCH}}_3\right)}_{\text{2}}$; (c) ${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{2}}\text{CN}$.