Reaction Roles of DBU in Different Systems: Experimental Judgment from a Strong Organic Base to Nucleophilic Catalysis and Participation in the Reaction Pathway

DBU [1,8-diazabicyclo[5.4.0]undec-7-ene] is commonly classified as a sterically hindered and strongly basic organic base, and it is widely used in deprotonation, elimination, cyclization, and condensation reactions. In actual reaction systems, however, the behavior of DBU is not limited to that ...