Site-selective Suzuki–Miyaura coupling of heteroaryl halides – understanding the trends for pharmaceutically important classes

Suzuki–Miyaura cross-coupling reactions of heteroaryl polyhalides with aryl boronates are surveyed. Drawing on data from literature sources and Pfizer's global chemistry RKB and CAS Scifinder® databases, factors that determine the site-selectivity of these reactions are discussed with a view to rationalising the trends.