Catalytic Friedel-Crafts acylation of heteroaromatics

Catalytic Friedel-Crafts acylation of heteroaromatics has been achieved using metal triflates as catalysts. While conventional Friedel-Crafts acylation often requires the use of more than stoichiometric amounts of aluminum chloride, metal triflates such as tin(H) triflate, scandium triflate, and gallium triflate, etc. have enabled efficient acylation reactions by catalytic use.