ChemInform Abstract: Asymmetric Organocatalytic Stepwise [2 + 2] Entry to Tetra‐Substituted Heterodimeric and Homochiral Cyclobutanes.

Abstract Two reactants, both derived from cinnamic acids, are subjected to the optimized conditions to produce highly substituted head‐to‐tail coupled dimeric cyclobutane structures such as (III) bearing an aldehyde function.