1: (Ph3P)2PdCl2, CuI, diisopropylamine / tetrahydrofuran / 1 h / Ambient temperature 2: PTSA / diethyl ether 3: 1.) dicyclohexylborane, 2.) AcOH / 1.) THF, from 0 to 20 deg C, 2.) THF, from 0 to 20 deg C, overnight 4: PTSA / methanol / Ambient temperature View Scheme