water; trichlorophosphate in N,N-dimethyl-formamide Vilsmeier reaction;

Multi-step reaction with 5 steps 1: 67 percent / CuCl2: 92 percent / POCl3, H2O / dimethylformamide / Vilsmeier reaction3: ethanol / 1 h / Ambient temperature4: sodium borohydride / Heating5: 51 percent / CuCl  

Multi-step reaction with 2 steps 1: sodium borohydride / Heating2: 51 percent / CuCl