1: MgBr2 2: 77 percent Chromat. / PdCl2<Ph2P(CH2)4PPh2> = <PdCl2(dppb)> / tetrahydrofuran / Heating; 0 deg C,then 1h at r.t. and reflux for 1h View Scheme

[1,4-bis-(diphenylphosphine)butane]palladium (II) dichloride in tetrahydrofuran Heating0 deg C,then 1h at r.t. and reflux for 1h;