Efficient synthesis of trisubstituted allenes via palladium-catalysed deaminative coupling of tertiary propargylamines with arylsiloxanes†

A novel and efficient method for the palladium-catalysed and highly regioselective synthesis of trisubstituted allenes via deaminative coupling of tertiary propargylamines with arylsiloxanes is reported. Both unactivated propargylamines and arylsiloxanes were activated in situ using Et₃N·3HF, followed by cross-coupling to facilitate C–C bond formation through C–N bond cleavage. The method demonstrates exceptional functional group compatibility, high yields, and readily accessible coupling partners.