Novel synthesis of 2,3-bisboryl-1,3-dienes from 1-bromo-1-lithioethene and 1,1-bisborylalkenes

Abstract

Treatment of 1,1-[bis(pinacolato)bory1]alkenes with excess of 1-bromo-1-lithioethene was found to give 2,3-bis[(pinacolato)bory1]-1,3-dienes in moderate to good yields. Synthetic applications of 2,3-[bis(pinacolato)bory1]-1,3-butadiene were also demonstrated.