1: PTSA / CH2Cl2 2: 1.) Et2NH, Pd(PPh3)4, CuI / 1.) 60 deg C, 1 h, 2.) Et2O, room temperature, 12 h View Scheme

copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); diethylamine 1.) 60 deg C, 1 h, 2.) Et2O, room temperature, 12 h; Yield given. Multistep reaction;

toluene-4-sulfonic acid in methanol 18 h;