copper (I) cyanide in tetrahydrofuran T=-78°C; 0.166667 h;

copper(I) bromide dimethylsulfide complex 1) THF, HMPA, ether, -16 deg C, 15 min, 2) THF, HMPA, -16 deg C, 80 min; Yield given. Multistep reaction. Yields of byproduct given;

copper (I) cyanide in tetrahydrofuran T=-78°C; 0.166667 h;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; copper(I) bromide dimethylsulfide complex in tetrahydrofuran T=-25°C; 2 h;

Multi-step reaction with 3 steps 1: 1.94 g / HCO2NH4 / Pd/C / methanol / 8.5 h / Heating2: Et3N / CH2Cl2 / 2 h / Ambient temperature3: 60 percent / DEAD, PPh3 / tetrahydrofuran / 2 h / Ambient temperature