hydrogen; nickel in methanol T=150°C; P=83600 Torr;

1: 57 percent / hydrogen / Raney nickel / methanol / 150 °C / 83600 Torr 2: 89 percent / pyridine / 12 h / 20 °C 3: 1.) sulfuryl chloride, Et3N, 2.) methaanol, 3.) MeONa / 1.) methylene chloride, 0 deg C, 1 h; 20 deg C, 1 h, 2.) 20 deg c, 2 h, 3.) reflux, 2 h View Scheme

1: 57 percent / hydrogen / Raney nickel / methanol / 150 °C / 83600 Torr 2: 89 percent / pyridine / 12 h / 20 °C View Scheme