甲基 (Z)-3-(4-氯苯基)丙-2-烯酸乙酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: 25.9 g of p-chlorocinnamic acid was dissolved in 250 ml of methanol, to the solution was added 1.5 ml of concentrated sulfuric acid, and the mixture was refluxed for 2 hours. The reaction mixture was poured on ice, and the mixture was alkalized with sodium bicarbonate and extracted twice with 1000 ml of chloroform. The extract was washed with a saturated sodium chloride aqueous solution, dried over magnesium sulfate and evaporated to remove the solvent under a reduced pressure, and resulting residue was applied to a silica gel column and eluted with hexane/ethyl acetate (10:1), to obtain 26.5 g of the methyl p-chlorocinnamate. the mixture was refluxed for 2 hours The reaction mixture was poured on ice extracted twice with 1000 ml of chloroform The extract was washed with a saturated sodium chloride aqueous solution dried over magnesium sulfate evaporated to remove the solvent under a reduced pressure resulting residue eluted with hexane/ethyl acetate (10:1)

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

实验步骤: A mixture of 290 g of p-chlorocinnamic acid, methyl ester, 500 g of nitromethane and 39 g of tetramethylguanidine is allowed to stir for 72 hours. The solution is diluted with ethyl ether and aqueous hydrochloric acid solution (1 N, 1 liter) is added. The organic layer is separated, dried over anhydrous magnesium sulfate, and evaporated to give 4-nitro-3-(4-chlorophenyl)butanoic acid methyl ester. is added The organic layer is separated dried over anhydrous magnesium sulfate evaporated

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

实验步骤: A mixture of 290 g of p-chlorocinnamic acid, methyl ester, 500 g of nitromethane and 39 g of tetramethylguanidine is allowed to stir for 72 hours. The solution is diluted with ethyl ether and aqueous hydrochloric acid solution (1 N, 1 liter) is added. The organic layer is separated, dried over anhydrous magnesium sulfate, and evaporated to give 4-nitro-3-(4-chlorophenyl)butanoic acid methyl ester. is added The organic layer is separated dried over anhydrous magnesium sulfate evaporated

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

实验步骤: A suspension of 300 g of 4-chlorocinnamic acid (J. Am. Chem. Soc., 89:3803, 1967) and 25 ml of concentrated sulfuric acid in 1.7 liters of methanol is heated to reflux for 24 hours. The solution is concentrated, and filtered to give as a white solid, p-chlorocinnamic acid methyl ester, mp 74°-5° C. is heated to reflux for 24 hours The solution is concentrated filtered

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

实验步骤: 25.9 g of p-chlorocinnamic acid was dissolved in 250 ml of methanol, to the solution was added 1.5 ml of concentrated sulfuric acid, and the mixture was refluxed for 2 hours. The reaction mixture was poured on ice, and the mixture was alkalized with sodium bicarbonate and extracted twice with 1000 ml of chloroform. The extract was washed with a saturated sodium chloride aqueous solution, dried over magnesium sulfate and evaporated to remove the solvent under a reduced pressure, and resulting residue was applied to a silica gel column and eluted with hexane/ethyl acetate (10:1), to obtain 26.5 g of the methyl p-chlorocinnamate. the mixture was refluxed for 2 hours The reaction mixture was poured on ice extracted twice with 1000 ml of chloroform The extract was washed with a saturated sodium chloride aqueous solution dried over magnesium sulfate evaporated to remove the solvent under a reduced pressure resulting residue eluted with hexane/ethyl acetate (10:1)

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: 25.9 g of p-chlorocinnamic acid was dissolved in 250 ml of methanol, to the solution was added 1.5 ml of concentrated sulfuric acid, and the mixture was refluxed for 2 hours. The reaction mixture was poured on ice, and the mixture was alkalized with sodium bicarbonate and extracted twice with 1000 ml of chloroform. The extract was washed with a saturated sodium chloride aqueous solution, dried over magnesium sulfate and evaporated to remove the solvent under a reduced pressure, and resulting residue was applied to a silica gel column and eluted with hexane/ethyl acetate (10:1), to obtain 26.5 g of the methyl p-chlorocinnamate. the mixture was refluxed for 2 hours The reaction mixture was poured on ice extracted twice with 1000 ml of chloroform The extract was washed with a saturated sodium chloride aqueous solution dried over magnesium sulfate evaporated to remove the solvent under a reduced pressure resulting residue eluted with hexane/ethyl acetate (10:1)

反应条件: temp:0.00; pressure:0.00; stir: