Michael addition is one of the most simple, efficient, and atom-economical methodologies for carbon–carbon bond formation, which is central to organic synthesis. It is usually performed in organic solvents in the presence of strong bases that often lead to side reactions. Thus, many more efficient and milder catalysts, including 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), [ 1 1. Ye , WP ; Xu , JY ; Tan , CT ; Tan , CH 1,5,7-Triazabicyclo[4.4.0]dec-5-ene ...