Heterocyclic compound, light-emitting element, light-emitting device, electronic device, and lighting device

A compound comprising the following structure:

• wherein:
• X2 represents halogen or a triflate group,
• Ar represents an arylene group having 6 to 13 carbon atoms, and
• R11 to R20 separately represent hydrogen.

A method for synthesizing a compound represented by a formula (G1), the method including:

• performing a reaction according to the following scheme:
• wherein:
• X2 represents halogen or a triflate group,
• Ar represents an arylene group having 6 to 13 carbon atoms,
• R11 to R20 separately represent any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• R52 and R53 separately represent any of hydrogen and an alkyl group having 1 to 6 carbon atoms,
• A represents any of a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group, and
• B represents boron.