甲基 2-[4-(2-甲氧基-2-氧乙基)苯基]乙酸甲酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 655 mg portion of lithium hydroxide was dissolved in 32 ml of water and added to 32 ml of a mixture of 6.4 g of dimethyl 2,2′-(1,4-phenylene)diacetate, 32 ml of THF and 32 ml of methanol. After 2Hours of stirring at room temperature, the reaction solution was neutralized with 1 M hydrochloric acid and extracted with chloroform. The organic layer was dried with anhydrous sodium sulfate and concentrated under a reduced pressure. The residue was purified by a silica gel column chromatography (chloroform-methanol) to obtain 2.6 g of [4-(2-methoxy-2-oxoethyl)phenyl]acetic acid. EN: 207. extracted with chloroform The organic layer was dried with anhydrous sodium sulfate concentrated under a reduced pressure The residue was purified by a silica gel column chromatography (chloroform-methanol)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-(2-Bromoethyl)benzaldehyde (3.245 g) was dissolved in tetrahydrofuran (60 ml). Under ice cooling, a 3 M solution (4.9 ml) of methylmagnesium bromide in diethyl ether was added dropwise thereinto and the resultant mixture was stirred for 1.5 hr. After adding water and ethyl acetate, the layers were separated and the organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was then purified by silica gel column chromatography (hexane/ethyl acetate system) to give the title compound (2.745 g) as a brown oil (yield: 83.8%). the layers were separated the organic layer was washed with brine dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was then purified by silica gel column chromatography (hexane/ethyl acetate system)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 655 mg portion of lithium hydroxide was dissolved in 32 ml of water and added to 32 ml of a mixture of 6.4 g of dimethyl 2,2′-(1,4-phenylene)diacetate, 32 ml of THF and 32 ml of methanol. After 2Hours of stirring at room temperature, the reaction solution was neutralized with 1 M hydrochloric acid and extracted with chloroform. The organic layer was dried with anhydrous sodium sulfate and concentrated under a reduced pressure. The residue was purified by a silica gel column chromatography (chloroform-methanol) to obtain 2.6 g of [4-(2-methoxy-2-oxoethyl)phenyl]acetic acid. EN: 207. extracted with chloroform The organic layer was dried with anhydrous sodium sulfate concentrated under a reduced pressure The residue was purified by a silica gel column chromatography (chloroform-methanol)