2: 80 percent / H2 / 5percent Pd-C / ethanol / 1 h / Ambient temperature View Scheme

Multi-step reaction with 2 steps 1: H2 / Pd/C2: 77 percent / diethyl phosphorocyanidate, triethylamine, molecular sieves 4A / tetrahydrofuran / 0 gradC for 1 h. then room temp. for 40 min.  

Multi-step reaction with 2 steps 1: 10percent HCl / methanol / 1 h / Ambient temperature2: diethyl phosphorocyanidate, triethylamine / tetrahydrofuran / 1) 0 deg C, 1 h, 2) r.t., 40 min