Yield:-

Steps:

Multi-step reaction with 3 steps
1: copper(l) iodide; tricyclohexylphosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidine][benzylidene]ruthenium(II) dichloride / diethyl ether / 19 h / 20 - 40 °C / Inert atmosphere
2: trifluoroacetic acid / dichloromethane / 0 - 20 °C / Inert atmosphere
3: 2-[(N,N-diisopropylamino)methyl]phenylboronic acid / acetonitrile / 12 h / 50 °C / Inert atmosphere

References:

Azuma, Takumi;Murata, Akihiro;Kobayashi, Yusuke;Inokuma, Tsubasa;Takemoto, Yoshiji [Organic Letters,2014,vol. 16,# 16,p. 4256 - 4259]