1: With oxalyl dichloride; dimethyl sulfoxide in dichloromethane T=-60°C; 0.0833333 h; 2: (5-Bromo-2-chlorophenyl)methanol in tetrahydrofuran; dichloromethane T=-60°C; 0.25 h; 3: With triethylamine in tetrahydrofuran; dichloromethane T=-60 - 20°C;

1: With pyrrolidine; sodium bis(2-methoxyethoxy)aluminium dihydride in tert-butyl methyl ether; toluene T=-20 - 25°C; 1.33333 h; 2: With potassium tert-butylate in tetrahydrofuran; tert-butyl methyl ether; toluene 3: methyl 5-bromo-2-chloro-benzoate in tetrahydrofuran; tert-butyl methyl ether; toluene T=10°C; 0.25 h;

1: With lithium aluminium tetrahydride in tetrahydrofuran T=-15 - -10°C; 1 h; 2: With water; ammonium chloride in tetrahydrofuran

1: 98 percent / H2SO4 / 72 h / Heating 2: pyrrolidine; t-BuOK; Red-Al / toluene; various solvent(s) / 0.25 h / 10 °C View Scheme