1: diisobutylaluminium hydride / tetrahydrofuran / -78 °C 2: 87 percent / B(OH)3 / W-2-Raney nickel / methanol; H2O / 25 °C 3: 53 percent / Rexyn 300 / H2O; tetrahydrofuran / 6 h / Heating View Scheme

diisobutylaluminium hydride in tetrahydrofuran T=-78°C; Yield given;

1: diisobutylaluminium hydride / tetrahydrofuran / -78 °C 2: 87 percent / B(OH)3 / W-2-Raney nickel / methanol; H2O / 25 °C View Scheme

boric acid; W-2-Raney nickel in methanol; water T=25°C; 1.5 h;