1: 90 percent / PPTS / ethanol / 3 h / Heating 2: 95 percent / DCC; DMAP 3: H2 / 10 percent Pd/C / 12 h 4: 87 percent / tetrahydrofuran / 1 h / 23 °C View Scheme

1: 90 percent / PPTS / ethanol / 3 h / Heating 2: 95 percent / DCC; DMAP View Scheme