Alternative Strategies Enabling Cross-Dehydrogenative Coupling: Access to C-C Bonds

Cross-dehydrogenative coupling (CDC) reactions have been esteemed as one of the straightforward and efficient tool for C-C bond formation. Typically, these reactions are generally realized via solvent-based thermochemistry, using a round bottom flask and a magnetic or mechanical stirrer. With the development of new synthetic strategies, alternative technologies currently available in laboratories that facilitate CDC reactions, such as photochemistry, electrochemistry and mechanochemistry have arisen rapidly, providing green and high efficiency strategies for the construction of C-C bonds which are perfect complement to traditional thermochemistry. In order to compare the advantages of each approaches more clearly, and promote the development of CDC reactions, CDC reactions related to two or more enabling technologies of same or similar substrates are reviewed, hoping to provide help for the development of CDC reaction and the development of new organic synthesis methods.