methyl 3-(2-hydroxyphenyl)prop-2-enoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred mixture of ortho-hydroxycinnamic acid (1.00 g, 6.09 mmol) in 10 mL of ether and 10 mL of methanol was added etheral diazomethane until the mixture became yellowish. The mixture was stirred at room temperature for 15 minutes, and the excess diazomethane was destroyed with the addition of acetic acid. The mixture was concentrated in vacuo and diluted with 100 mL of ethyl acetate. This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL). The organic layer was dried (magnesium sulfate), filtered and concentrated in vacuo to give 1.02 g (94%) of methyl ortho-hydroxycinnamate B. the excess diazomethane was destroyed with the addition of acetic acid The mixture was concentrated in vacuo diluted with 100 mL of ethyl acetate This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL) The organic layer was dried (magnesium sulfate) filtered concentrated in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of methyl 2-hydroxycinnamate (1.31 g; 7.33 mmol) in 50 ml acetone was added 1,3-dibromopropane (1.50 ml; 14.8 mmol) and K2CO3 (4.36 g; 13.4 mmol). The mixture was heated to reflux for 12 h, cooled to r.t, diluted with hexane (50 ml), filtered and finally concentrated to afford the title product (1.96 g; 50% pure), which was used as such in the next step. The mixture was heated to reflux for 12 h cooled filtered finally concentrated

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a 250-mL round bottom flask were added, in turn, 5.57 g (33.9 mmol) of 2-hydroxycinnamic acid, 80 mL of methanol, and 6 drops of concentrated sulfuric acid. The resulting clear solution was heated to reflux for 6 hours and then allowed to cool to room temperature. The solvent was removed in vacuo to give a sticky white solid. The solid was dissolved in 80 mL of ethyl acetate, and washed with: 3 40-mL portions of 10% aqueous sodium bicarbonate; 1 40-mL portion of water; and 2 25 mL portions of brine. The organic layer was concentrated in vacuo to give 5.51 g (91.4%) of methyl 2-hydroxycinnamate as a white solid. The resulting clear solution was heated to reflux for 6 hours The solvent was removed in vacuo to give a sticky white solid washed with: 3 40-mL portions of 10% aqueous sodium bicarbonate The organic layer was concentrated in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a 250-mL round bottom flask were added, in turn, 5.57 g (33.9 mmol) of 2-hydroxycinnamic acid, 80 mL of methanol, and 6 drops of concentrated sulfuric acid. The resulting clear solution was heated to reflux for 6 hours and then allowed to cool to room temperature. The solvent was removed in vacuo to give a sticky white solid. The solid was dissolved in 80 mL of ethyl acetate, and washed with: 3 40-mL portions of 10% aqueous sodium bicarbonate; 1 40-mL portion of water; and 2 25 mL portions of brine. The organic layer was concentrated in vacuo to give 5.51 g (91.4%) of methyl 2-hydroxycinnamate as a white solid. The resulting clear solution was heated to reflux for 6 hours The solvent was removed in vacuo to give a sticky white solid washed with: 3 40-mL portions of 10% aqueous sodium bicarbonate The organic layer was concentrated in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred mixture of ortho-hydroxycinnamic acid (1.00 g, 6.09 mmol) in 10 mL of ether and 10 mL of methanol was added etheral diazomethane until the mixture became yellowish. The mixture was stirred at room temperature for 15 minutes, and the excess diazomethane was destroyed with the addition of acetic acid. The mixture was concentrated in vacuo and diluted with 100 mL of ethyl acetate. This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL). The organic layer was dried (magnesium sulfate), filtered and concentrated in vacuo to give 1.02 g (94%) of methyl ortho-hydroxycinnamate B. the excess diazomethane was destroyed with the addition of acetic acid The mixture was concentrated in vacuo diluted with 100 mL of ethyl acetate This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL) The organic layer was dried (magnesium sulfate) filtered concentrated in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred mixture of ortho-hydroxycinnamic acid (1.00 g, 6.09 mmol) in 10 mL of ether and 10 mL of methanol was added etheral diazomethane until the mixture became yellowish. The mixture was stirred at room temperature for 15 minutes, and the excess diazomethane was destroyed with the addition of acetic acid. The mixture was concentrated in vacuo and diluted with 100 mL of ethyl acetate. This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL). The organic layer was dried (magnesium sulfate), filtered and concentrated in vacuo to give 1.02 g (94%) of methyl ortho-hydroxycinnamate B. the excess diazomethane was destroyed with the addition of acetic acid The mixture was concentrated in vacuo diluted with 100 mL of ethyl acetate This ethyl acetate solution was washed with saturated sodium bicarbonate solution (3×60 mL) and brine (1×60 mL) The organic layer was dried (magnesium sulfate) filtered concentrated in vacuo