1: 99 percent / PPTS / CH2Cl2 2: 99 percent / Bu4NF / tetrahydrofuran 3: 77 percent / PDC 4: 96 percent / NaH 5: 96 percent / pyridine 6: 96 percent / Amberlyst / methanol 7: 86 percent / (COCl)2; DMSO 8: 70 percent / various solvent(s) / 36 h / 185 °C View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 98 percent / NaH<br />2: 73 percent / PDC<br />3: 90 percent<br /> <br /> &nbsp;