2-糠酸甲酯

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:

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

实验步骤: A mixture of methyl 2-furoate (23 g, 0.18 mole) and acetone (10.6 g, 0.18 mole) was slowly added to a stirred suspension of potassium tert-butoxide (41 g, 0.36 mole) in anhydrous toluene (300 ml) at 0° C. Upon standing overnight at room temperature, glacial acetic acid (22 ml, 0.36 mole) and then water (100 ml) were added. The organic layer was separated, combined with an ether extract of the aqueous phase, washed with water, dried, and distilled to give 1-(2-furyl)-1,3-dioxobutane: b.p. 66°-70° C./0.1 mm (18.5 g). The organic layer was separated extract of the aqueous phase washed with water dried distilled

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

实验步骤: Methyl furoate (50.4 g.) is dissolved in 180 ml. of methanol. Thereafter 1 g. of 5 percent palladium-on-charcoal is added. This mixture is then hydrogenated at 1 to 3 atmospheres. After 45 hours 0.79 moles of hydrogen are consumed. The black mixture is then filtered through Celite using 50 ml. of methanol to wash the reaction flask and filter. Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g. of a yellow oil which is thereafter distilled, collecting that fraction boiling at 32°-35° C. Thereby, methyl tetrahydrofuroate (46.7 g.) is prepared. The black mixture is then filtered through Celite of methanol to wash the reaction flask filter Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g of a yellow oil which is thereafter distilled collecting that fraction boiling at 32°-35° C

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

实验步骤: Methyl furoate is dissolved in 180 ml. of methanol. Thereafter 1 g. of 5 percent palladium-on-charcoal is added. This mixture is then hydrogenated at 1 to 3 atmospheres. After 45 hr. 0.79 moles of hydrogen are consumed. The black mixture is then filtered through Celite using 50 ml. of methanol to wash the reaction flask and filter. Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g. of a yellow oil which is thereafter distilled, collecting that fraction boiling at 32°-35° C. Thereby, methyl tetrahydrofuroate (46.7 g.) is prepared. The black mixture is then filtered through Celite of methanol to wash the reaction flask filter Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g of a yellow oil which is thereafter distilled collecting that fraction boiling at 32°-35° C

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

实验步骤: Methyl furoate is dissolved in 180 ml. of methanol. Thereafter 1 g. of 5 percent palladium-on-charcoal is added. The mixture is then hydrogenated at 1 to 3 atmospheres. After 45 hr. 0.79 moles of hydrogen are consumed. The black mixture is then filtered through Celite using 50 ml. of methanol to wash the reaction flask and filter. Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g. of a yellow oil which is thereafter distilled, collecting that fraction boiling at 32°-35° C. Thereby, methyl tetrahydrofuroate (46.7 g.) is prepared. The black mixture is then filtered through Celite of methanol to wash the reaction flask filter Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g of a yellow oil which is thereafter distilled collecting that fraction boiling at 32°-35° C

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

实验步骤: Methyl furoate is dissolved in 180 ml. of methanol. Thereafter 1 g. of 5 percent palladium-on-charcoal is added. The mixture is then hydrogenated at 1 to 3 atmospheres. After 45 hr. 0.79 moles of hydrogen are consumed. The black mixture is then filtered through Celite using 50 ml. of methanol to wash the reaction flask and filter. Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g. of a yellow oil which is thereafter distilled, collecting that fraction boiling at 32°-35° C. Thereby, methyl tetrahydrofuroate (46.7 g.) is prepared. The black mixture is then filtered through Celite of methanol to wash the reaction flask filter Evaporation of the filtrate under reduced pressure at 40°-45° C. bath temperature yields 51 g of a yellow oil which is thereafter distilled collecting that fraction boiling at 32°-35° C

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

实验步骤: Methyl furoate (75 g, 0.595 mole) was dissolved in MeOH (150 ml), and poured into a Parr bottle. Air was replaced with argon, and then 10% Pd/C (2.5 g) was added. The atmosphere was replaced with H2 and methyl furoate was hydrogenated at 40 psi for 48 hours. The reaction was filtered through celite pad, and the pad was washed with ether. The filtrate and the wash were combined and distilled to give the title compound (71 g, 0.546 mole, 59° C./5.1 mmHg, 92%) as a colorless liquid. poured into a Parr bottle The reaction was filtered through celite pad the pad was washed with ether distilled

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

实验步骤: Methyl furoate (75 g, 0.595 mole) was dissolved in MeOH (150 ml), and poured into a Parr bottle. Air was replaced with argon, and then 10% Pd/C (2.5 g) was added. The atmosphere was replaced with H2 and methyl furoate was hydrogenated at 40 psi for 48 hours. The reaction was filtered through celite pad, and the pad was washed with ether. The filtrate and the wash were combined and distilled to give the title compound (71 g, 0.546 mole, 59° C./5.1 mmHg, 92%) as a colorless liquid. poured into a Parr bottle The reaction was filtered through celite pad the pad was washed with ether distilled

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

实验步骤: Methyl furoate (75 g, 0.595 mole) was dissolved in MeOH (150 mll), and poured into a Parr bottle. Air was replaced with argon, and then 10% Pd/C (2.5 g) was added. The atmosphere was replaced with H2 and methyl furoate was hydrogenated at 40 psi for 48 hours. The reaction was filtered through celite pad, and the pad was washed with ether. The filtrate and the wash were combined and distilled to give the title compound (71 g, 0.546 mole, 59° C./5.1 mmHg, 92%) as a colorless liquid. poured into a Parr bottle The reaction was filtered through celite pad the pad was washed with ether distilled