Ethyl bromoacetate → Ethyl 2-(3-methyl-4-nitrophenoxy)acetate

反応式

[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([OH:10])=[CH:6][C:5]=1[CH3:11])([O-:3])=[O:2].Br[CH2:13][C:14]([O:16][CH2:17][CH3:18])=[O:15].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([O:10][CH2:13][C:14]([O:16][CH2:17][CH3:18])=[O:15])=[CH:6][C:5]=1[CH3:11])([O-:3])=[O:2]

参加物

実験手順

The product was prepared by the alkylation of 4-nitro-3-methylphenol (15.3 g) with ethyl bromoacetate (16.7 g) in DMF (150 mL) in the presence of potassium carbonate (13.8 g) to afford ethyl 4-nitro-3-methylphenoxyacetate; hydrogenation of the latter (7.18 g, 0.03 mol) in ethanol (250 mL) in the presence of 5% palladium on carbon (2.1 g) to afford 6.20 g (99%) of ethyl 4-amino-3-methylphenoxyacetate as a brown oil; and treatment of the latter (6.2 g, 0.0296 mol) in CH2Cl2 (100 mL) with pyridine (10 mL), followed by methanesulfonylchloride (3.73 g, 0.033 mol) to afford 6.54 g (76.9%) of N-[4-(ethoxycarbonylmethoxy)-2-(methyl)phenyl]methanesulfonamide, m.p. 93°-94° C., after recrystallization from ethanol.