<Tr> <Td> RSC ontology ID </Td> <Td> RXNO: 0000369 </Td> </Tr> <P> The Friedel--Crafts reactions are a set of reactions developed by Charles Friedel and James Crafts in 1877 to attach substituents to an aromatic ring . Friedel--Crafts reactions are of two main types: alkylation reactions and acylation reactions . Both proceed by electrophilic aromatic substitution . </P> <Table> <Tr> <Th_colspan="2"> Friedel - Crafts alkylation </Th> </Tr> <Tr> <Td> Named after </Td> <Td> Charles Friedel James Crafts </Td> </Tr> <Tr> <Td> Reaction type </Td> <Td> Coupling reaction </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Td> Organic Chemistry Portal </Td> <Td> friedel - crafts - alkylation </Td> </Tr> <Tr> <Td> RSC ontology ID </Td> <Td> RXNO: 0000046 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Friedel - Crafts alkylation </Th> </Tr>

What type of reaction is friedel crafts alkylation