Ultrasonic Reactions

The most modern ultrasonic devices rely on transducers, which are composed of piezoelectric materials. Cavitation induces very high local temperatures and pressures inside the bubbles, leading to a turbulent flow of the liquid and enhanced mass transfer. Aldol/condensations reactions are an important class of organic reaction once they are extremely used in the formation of the C-C bond. A one-pot methodology to synthesize 4-styryl biphenyls 133 units was developed using a cascade reaction involving Wittig-Suzuki in a phosphine-free system. The Diels-Alder reactions importance as a synthetic tool in organic chemistry is unquestionable in the creation of cyclic molecules and heterocyclic. The importance of heterocycles in many fields of science can hardly be overemphasized and justifies a long lasting effort to work out new synthetic protocols for their production. Sonogashira cross-coupling reaction is the best reaction to perform alkynylation of aryl or vinyl halides.