1,5-hexadienerhodium(I) chloride dimer in n-heptane T=75°C; 14 h;

1: naphthalene-2-ylacetic acid With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in dichloromethane T=20°C; 0.5 h; 2: isopropyl alcohol With sodium tetrahydroborate in tetrahydrofuran T=0°C; 0.5 h;

tert.-butyl lithium; potassium hydride 1) THF, 0 deg C, 20 min, 2) THF, pentane, -78 deg C, 15 min, 3) THF, pentane, -78 deg C, 15 min; 0 deg C, 50 min; Yield given. Multistep reaction;

1,5-hexadienerhodium(I) chloride dimer overnight or in n-heptane;