Transition-metal-free regioselective synthesis of alkylboronates from arylacetylenes and vinyl arenes

A transition-metal-free synthesis of alkylboronates, utilizing arylacetylenes or vinyl arenes and bis(pinacolato) diboron through tandem borylation and protodeboronation, has been developed. This reaction is efficient, practical and environmentally benign, leading to anti-Markovnikov products with excellent regioselectivity, broad functional group tolerance and excellent yields in both small and gram scales.