Chemical synthesis of various composites of chromen-2-one: A review

Chromen-2-one composites are a type of heterocycles that has a wide range of uses in healthcare technology, biological research, and a variety of commercial fields. Many attempts are being made to create the innovative and more realistic ways of manufacturing such molecules in order to achieve this goal. Several chromen-2-one composite synthesis procedures are described in this study, including Von Pechmann condensation, Knoevenagel condensation, Kostanecki reaction, Baylis-Hillman retort, Michael addition, electrophilic reaction mediated by vinyl phosphonium salt, and the reaction of Heck-lactonization.