dimethyl (2E,4E)-hexa-2,4-dienedioate

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of styrene (13.5 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated. The residue is redissolved in triglyme (0.5 M). Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal Temperature probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed. Some dimethyl 2-phenyl-cyclohexane-1,4-dicarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated The residue is redissolved in triglyme (0.5 M) Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of methyl acrylate (10.6 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated (0.5 M). Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed. Some trimethyl cyclohexane-1,2,4-tricarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated (0.5 M) Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed

反応条件: temp:165.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a Parr pressure reactor, a stirred suspension of trans,trans dimethyl muconate (6.1 g, 36 mmol) in dimethyldipropyleneglycol (120 ml, 0.3 M) is heated under vinyl chloride pressure (18 psi (0.124 MPa) at 23° C.) to 165° C. for 48 hours. After cooling to room temperature, the reaction mixture is diluted using the same solvent to 200 ml in a volumetric flask, transferred into a round-bottom flask equipped with a magnetic stirring bar, and Pd/C catalyst is added (360 mg of Johnson-Matthey 5 percent Pd/C #6, 0.2 mol percent) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux while samples are taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h) to monitor the progress of the reactions occurring. After 8 hour reaction time, dimethyl chloro-terephthalate is present. Some material also undergoes C—Cl bond cleavage and dimethyl 2-chloro-cyclohexane-1,4-dicarboxylate is also formed. After cooling to room temperature the reaction mixture is diluted transferred into a round-bottom flask equipped with a magnetic stirring bar The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux while samples are taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h)

反応条件: temp:165.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a Parr reactor, a mixture of trans,trans dimethyl muconate (6.13 g, 36.0 mmol) and diglyme (120 ml, 0.30 M) is heated to 165° C. for 24 hours under ethylene pressure (pRT=259 psi (1.79 MPa)). After cooling to room temperature, the weakly yellow, clear solution is diluted using diglyme to 200 ml in a volumetric flask, transferred into a round-bottom flask equipped with a magnetic stirring bar, and catalytic palladium on carbon (Pd/C) is added (356 mg of Johnson-Matthey 5 percent Pd/C #6, 0.2 mole percent) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal Temperature probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux (Tmax,observed=169° C.) while samples were taken at appropriate intervals (i=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h) to monitor the progress of the reactions occurring. Rapid (t≦1 h) disappearance of the dimethyl cyclohex-2-ene-1,4-dicarboxylate, □2, 2-ene is observed concurrent with some material undergoing tautomerization to its thermodynamically more stable isomer (dimethyl cyclohex-1-ene-1,4-dicarboxylate, □1, l-ene), while also the desired oxidation/dehydrogenation/aromatization product dimethyl terephthalate (DMT) and some reduced material (dimethyl cyclohexane-1,4-dicarboxylate CHa) are formed. After 8 hours reaction time, 77 percent DMT, 17 percent cyclohexane, and 5 percent tautomer are present. The graph of FIG. 2 shows the concentration of materials at various time intervals. After cooling to room temperature the weakly yellow, clear solution is diluted transferred into a round-bottom flask equipped with a magnetic stirring bar The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux (Tmax,observed=169° C.) while samples were taken at appropriate intervals (i=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h)

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of styrene (13.5 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated. The residue is redissolved in triglyme (0.5 M). Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal Temperature probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed. Some dimethyl 2-phenyl-cyclohexane-1,4-dicarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated The residue is redissolved in triglyme (0.5 M) Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of methyl acrylate (10.6 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated (0.5 M). Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature. The flask is equipped with a reflux condenser, flitted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed. Some trimethyl cyclohexane-1,2,4-tricarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated (0.5 M) Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature The flask is equipped with a reflux condenser is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed

反応条件: temp:165.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a Parr pressure reactor, a stirred suspension of trans,trans dimethyl muconate (6.1 g, 36 mmol) in dimethyldipropyleneglycol (120 ml, 0.3 M) is heated under vinyl chloride pressure (18 psi (0.124 MPa) at 23° C.) to 165° C. for 48 hours. After cooling to room temperature, the reaction mixture is diluted using the same solvent to 200 ml in a volumetric flask, transferred into a round-bottom flask equipped with a magnetic stirring bar, and Pd/C catalyst is added (360 mg of Johnson-Matthey 5 percent Pd/C #6, 0.2 mol percent) at room temperature. The flask is equipped with a reflux condenser, flitted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux while samples are taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h) to monitor the progress of the reactions occurring. After 8 hour reaction time, dimethyl chloro-terephthalate is present. Some material also undergoes C—Cl bond cleavage and dimethyl 2-chloro-cyclohexane-1,4-dicarboxylate is also formed. After cooling to room temperature the reaction mixture is diluted transferred into a round-bottom flask equipped with a magnetic stirring bar The flask is equipped with a reflux condenser is heated to reflux while samples are taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h)

反応条件: temp:165.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a Parr reactor, a mixture of trans,trans dimethyl muconate (6.13 g, 36.0 mmol) and diglyme (120 ml, 0.30 M) is heated to 165° C. for 24 hours under ethylene pressure (pRT=259 psi (1.79 MPa)). After cooling to room temperature, the weakly yellow, clear solution is diluted using diglyme to 200 ml in a volumetric flask, transferred into a round-bottom flask equipped with a magnetic stirring bar, and catalytic palladium on carbon (Pd/C) is added (356 mg of Johnson-Matthey 5 percent Pd/C #6, 0.2 mole percent) at room temperature. The flask is equipped with a reflux condenser, fitted gas dispersion tube, and internal Temperature probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux (Tmax, observed=169° C.) while samples were taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h) to monitor the progress of the reactions occurring. Rapid (t≦1 h) disappearance of the dimethyl cyclohex-2-ene-1,4-dicarboxylate, □2, 2-ene is observed concurrent with some material undergoing tautomerization to its thermodynamically more stable isomer (dimethyl cyclohex-1-ene-1,4-dicarboxylate, □1, 1-ene), while also the desired oxidation/dehydrogenation/aromatization product dimethyl terephthalate (DMT) and some reduced material (dimethyl cyclohexane-1,4-dicarboxylate CHa) are formed. After 8 hours reaction time, 77 percent DMT, 17 percent cyclohexane, and 5 percent tautomer are present. The graph of FIG. 2 shows the concentration of materials at various time intervals. After cooling to room temperature the weakly yellow, clear solution is diluted transferred into a round-bottom flask equipped with a magnetic stirring bar The flask is equipped with a reflux condenser fitted gas dispersion tube is heated to reflux (Tmax, observed=169° C.) while samples were taken at appropriate intervals (t=0.0, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0 h)

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

実験手順: A solution of 1.70 gram of dimethyl trans-transmuconate, 5.62 grams of 1-cyclohexyloxy-2,2,6,6-tetra-methylpiperidin-4-ol and 0.025 gram of lithium amide in 100 ml of toluene is heated under reflux with a Dean-Stark trap for 8 hours. The reaction mixture is then diluted with ethyl acetate, and then washed with water, brine and dried over anhydrous magnesium sulfate. Concentration under reduced pressure followed by chromatographic separation affords the title compound as a white solid. under reflux with a Dean-Stark trap for 8 hours washed with water, brine dried over anhydrous magnesium sulfate Concentration under reduced pressure followed by chromatographic separation

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of styrene (13.5 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated. The residue is redissolved in triglyme (0.5 M). Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal Temperature probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed. Some dimethyl 2-phenyl-cyclohexane-1,4-dicarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated The residue is redissolved in triglyme (0.5 M) Pd/Al2O3 catalyst is added (636 mg (0.5 mol percent) of Johnson-Matthey 5 percent Pd/Al2O3 #12) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 63 hours whereby dimethyl phenyl-terephthalate is formed

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of methyl acrylate (10.6 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated (0.5 M). Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed. Some trimethyl cyclohexane-1,2,4-tricarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated (0.5 M) Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed

反応条件: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of methyl acrylate (10.6 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated (0.5 M). Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature. The flask is equipped with a reflux condenser, fritted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed. Some trimethyl cyclohexane-1,2,4-tricarboxylate is also produced. In a 75 ml sealed tube After cooling to room temperature the reaction mixture is filtered transferred to a flask concentrated (0.5 M) Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature The flask is equipped with a reflux condenser, fritted gas dispersion tube is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed