Horner-Wadsworth-Emmons reaction of stannylvinylphosphonates
with aldehydes and mild thermal cyclisation provides disubstituted
arylstannanes. Subsequent Stille coupling leads to regiospecific
synthesis of m- and p-terphenyls.
Horner-Wadsworth-Emmons - Palladium
coupling arylstannanes - Stille reaction - terphenyls