*3.4. Products Characterization.*

All the synthesized products were known compounds and the obtained data were in agreemen<sup>t</sup> with the published ones:

[134] for products **3aa**, **3ab**, **3ac**, **3ad**, **3af**, **3ag**, and **3ah**;


As an example, the complete characterization of the most studied aldol product **3ad** (*anti* isomer) is reported in the Supplementary Materials. CSP-HPLC separation conditions and chromatograms of all the aldol products **3** are reported in the Supplementary Materials.
