1. Introduction: DBU – the “universal player” in the chemistry industry In the chemistry world, 1,8-diazabicycloundene (1,8-Diazabicyclo[5.4.0]undec-7-ene, DBU for short) is known for its unique molecular structure and excellent catalytic properties. It is like a skilled magician, showing amazing abilities in different chemistry. DBU is not only an efficient alkaline catalyst, but also plays an...