1: 97 percent / acetic acid; acetic anhydride / 4 h / Ambient temperature 2: 96 percent / lithium aluminum hydride / diethyl ether / 2 h / Heating 3: 100 percent / diethyl ether; pyridine / 2 h / Heating 4: 5 percent / PPA, phosphorus pentoxide / toluene / 24 h / Heating View Scheme

1: 100 percent / diethyl ether; pyridine / 2 h / Heating 2: 5 percent / PPA, phosphorus pentoxide / toluene / 24 h / Heating View Scheme

1: 96 percent / lithium aluminum hydride / diethyl ether / 2 h / Heating 2: 100 percent / diethyl ether; pyridine / 2 h / Heating 3: 5 percent / PPA, phosphorus pentoxide / toluene / 24 h / Heating View Scheme

P2O5 in toluene 24 h; Heating; Further byproducts given. Yields of byproduct given;

P2O5 in toluene 24 h; Heating; Yield given. Further byproducts given;

P2O5 in toluene 24 h; Heating; Further byproducts given;