C56H54O4P4; [Rh(nbd)2(SbF6)]; hydrogen in 1,1-dimethylpropan-1-ol T=125°C; P=37503.8 Torr; 16 h; Autoclave; Overall yield = 71 percent; Overall yield = 80 percentChromat.; regioselective reaction;

lithium aluminium tetrahydride in tetrahydrofuran 3 h; Heating;

1: 81 percent / ethyl acetate / RT, 1 h; 40 deg C, 1 h; reflux, 2 h 2: 76 percent / lithium aluminum hydride / tetrahydrofuran / 3 h / Heating View Scheme

1: 1.) boron trifluoride etherate, molecular sieve 4A / 1.) toluene, reflux, 40 h; 2.) THF, RT, 24 h 2: 76 percent / lithium aluminum hydride / tetrahydrofuran / 3 h / Heating View Scheme