HIGH-THROUGHPUT EXPERIMENTATION OF THE BUCHWALD-HARTWIG AMINATION FOR REACTION SCOUTING AND GUIDED SYNTHESIS

Aromatic C-N bond formation is critical for synthetic chemistry in pharmaceutical, agrochemical, and natural product synthesis. Due to the prevalence of this bond class, many synthetic routes have been developed over time to meet the demand. The most recent and robust C-N bond formation reaction is the palladium catalyzed Buchwald-Hartwig amination. Considering the importance of the Buchwald-Hartwig amination, a high-throughput experimentation (HTE) campaign was devised to create a library in which chemists can refer to optimal reaction conditions and ligand/catalyst choice based on the nature of their substrates to be coupled. This study showed trends for the appropriate choice of ligand and catalyst, along with what bases, temperatures, stoichiometries, and solvents are appropriate for the selected substrate combination at hand.