3-溴-4-甲基丁酸酐

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 3-methyl-2,5-furandione (citraconic anhydride, 1 g), AlBr3 (26 mg) and Br2 (0.46 mL) was heated at 120° C. overnight. Ethyl acetate was then added and the organic phase was washed with HCl 0.1% and then with brine. The organic phase was dried and concentrated in vacuo to give the crude product (1.680 g) that was used without further purification. the organic phase was washed with HCl 0.1% The organic phase was dried concentrated in vacuo

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 3-methyl-2,5-furandione (citraconic anhydride, 1 g), AlBr3 (26 mg) and Br2 (0.46 mL) was heated at 120° C. overnight. Ethyl acetate was then added and the organic phase was washed with HCl 0.1% and then with brine. The organic phase was dried and concentrated in vacuo to give the crude product (1.680 g) that was used without further purification. the organic phase was washed with HCl 0.1% The organic phase was dried concentrated in vacuo

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 3-methyl-2,5-furandione (citraconic anhydride, 1 g), AlBr3 (26 mg) and Br2 (0.46 mL) was heated at 120° C. overnight. Ethyl acetate was then added and the organic phase was washed with HCl 0.1% and then with brine. The organic phase was dried and concentrated in vacuo to give the crude product (1.680 g) that was used without further purification. the organic phase was washed with HCl 0.1% The organic phase was dried concentrated in vacuo

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 3-bromo-4-methyl-2,5-furandione (prepared as described in Org. and Bimolecular chemistry, pag 1782, 2004; 4.8 g, 25.1 mmol) and {[2,4-bis(methyloxy)phenyl]methyl}amine (3.78 mL, 25.1 mmol) were dissolved in acetic acid (100 mL) and the mixture was stirred at 100° C. overnight. Solvent was then concentrated under reduced pressure, additional acetic acid (100 mL) was added followed by sodium acetate (1.443 g, 17.59 mmol) and the mixture was refluxed for further 3 hours. Solvent was eliminated under reduced pressure and the residue was partitioned between DCM and water. Organic phase was washed with water, dried and solvent was eliminated under reduced pressure providing a crude that was purified by flash chromatography (eluent: Cy to Cy/AcOEt 7:3) affording 1-{[2,4-bis(methyloxy)phenyl]methyl}-3-bromo-4-methyl-1H-pyrrole-2,5-dione (8.55 g, 25.1 mmol, 100% yield) as a light yellow solid. Solvent was then concentrated under reduced pressure, additional acetic acid (100 mL) was added the mixture was refluxed for further 3 hours the residue was partitioned between DCM and water Organic phase was washed with water dried providing a crude that was purified by flash chromatography (eluent: Cy to Cy/AcOEt 7:3)

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 3-methyl-2,5-furandione (citraconic anhydride, 1 g), AlBr3 (26 mg) and Br2 (0.46 mL) was heated at 120° C. overnight. Ethyl acetate was then added and the organic phase was washed with HCl 0.1% and then with brine. The organic phase was dried and concentrated in vacuo to give the crude product (1.680 g) that was used without further purification. the organic phase was washed with HCl 0.1% The organic phase was dried concentrated in vacuo