4-Methoxybenzyl alcohol → 4-((4-Methoxybenzyl)oxy)-2-methylene-4-oxobutanoic acid
反応式
[C:1]1(=[O:8])[O:7][C:5](=[O:6])[CH2:4][C:2]1=[CH2:3].[CH3:9][O:10][C:11]1[CH:18]=[CH:17][C:14]([CH2:15][OH:16])=[CH:13][CH:12]=1>CCCCCC>[CH3:9][O:10][C:11]1[CH:18]=[CH:17][C:14]([CH2:15][O:16][C:5]([CH2:4][C:2]([C:1]([OH:8])=[O:7])=[CH2:3])=[O:6])=[CH:13][CH:12]=1参加物
4
実験手順
A 250 ml one-necked round bottomed flask equipped with reflux condenser, nitrogen inlet, and magnetic stir bar was charged with itaconic anhydride (33.6 g, 0.3 mol) toluene (100 ml) and 4-methoxybenzyl alcohol (41.5 g, 0.3 mol). The solution was then warmed to reflux for 60 minutes and then cooled to room temperature. The solution was poured into a 500 ml Erlenmeyer flask, diluted with 100 ml of hexane and allowed to stand whereupon crystals of pure monoester formed. The product was isolated by filtration on a Buchner funnel and air dried to give 45.4 g, 61% of material with mp 83°-85° C., a second crop, 12.9 g, 17% was isolated after cooling of the filtrate in an ice bath.