1: 77 percent / hydrogen / 5 percent palladium on barium sulfate / methanol 2: 1.) triethylamine, methanesulfonyl chloride; 2.) sodium iodide / 1.) THF, 0 deg C, 0.5 h; 2.) 20 min., 25 deg C, THF View Scheme

methanesulfonyl chloride; triethylamine; sodium iodide 1.) THF, 0 deg C, 0.5 h; 2.) 20 min., 25 deg C, THF; Yield given. Multistep reaction;