N-(1,3-dioxo-2-benzofuran-4-yl)acetamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 1 L 3-necked round bottom flask was equipped with a mechanical stirrer, thermometer, and condenser and charged with 3-aminophthalic acid (108 g, 596 mmol) and acetic anhydride (550 mL). The reaction mixture was heated to reflux for 3 hours and cooled to about 25° C. and further to 0-5° C. for another 1 hour. The crystalline solid was collected by vacuum filtration and washed with ether. The solid product was dried in vacuo at ambient temperature to a constant weight, giving 75 g (61% yield) of 3-acetamidopthalic anhydride as a white product. 1H-NMR (CDCl3) δ: 2.21 (s, 3H), 7.76 (d, 1H), 7.94 (t, 1H) 8.42 (d, 1H), 9.84 (s, 1H). A 1 L 3-necked round bottom flask was equipped with a mechanical stirrer The reaction mixture was heated to reflux for 3 hours The crystalline solid was collected by vacuum filtration washed with ether The solid product was dried in vacuo at ambient temperature to a constant weight

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A stirred solution of 1-(3-ethoxy-4-methoxyphenyl)-2-methylsulfonylethylamine (1.0 g, 3.7 mmol) and 3-acetamidophthalic anhydride (751 mg, 3.66 mmol) in acetic acid (20 mL) was heated at reflux for 15 h. The solvent was removed in vacuo to yield an oil. Chromatography of the resulting oil yielded the product as a yellow solid (1.0 g, 59% yield): mp, 144° C.; 1H NMR (CDCl3) δ: 1.47 (t, J=7.0 Hz, 3H, CH3), 2.26 (s, 3H, CH3), 2.88 (s, 3H, CH3), 3.75 (dd, J=4.4, 14.3 Hz, 1H, CH), 3.85 (s, 3H, CH3), 4.11 (q, J=7 Hz, 2H, CH2), 5.87 (dd, J=4.3, 10.5 Hz, 1H, NCH), 6.82-6.86 (m, 1H, Ar), 7.09-7.11 (m, 2H, Ar), 7.47 (d, J=7 Hz, 1H, Ar), 7.64 (t, J=8 Hz, 1H, Ar), 8.74 (d, J=8 Hz, 1H, Ar), 9.49 (br s, 1H, NH); 13C NMR (CDCl3) δ: 14.61, 24.85, 41.54, 48.44, 54.34, 55.85, 64.43, 111.37, 112.34, 115.04, 118.11, 120.21, 124.85, 129.17, 130.96, 136.01, 137.52, 148.54, 149.65, 167.38, 169.09, 169.40; Anal Calc'd. for C22H24NO7S: C, 57.38; H, 5.25; N, 6.08. Found: C, 57.31; H, 5.34; N, 5.83. at reflux for 15 h The solvent was removed in vacuo to yield an oil

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-[1-(3-Ethoxy-4-methoxyphenyl)-2-methylsulfonylethyl]-4-acedtamidoisoindoline-1,3-dione was prepared by the procedure of Example 8 from 1-(3-ethoxy-4-methoxyphenyl)-2-methylsulfonylethylamine (1.0 g, 3.7 mmol) and 3-acetamidophthalic anhydride (751 mg, 3.66 mmol) in acetic acid (20 mL). The product was obtained as a yellow solid (1.0 g, 59% yield): mp, 144.0° C.; 1H NMR (CDCl3) δ 1.47 (t, J=7.0 Hz, 3H, CH3), 2.26 (s, 3H, CH3), 2.88 (s, 3H, CH3), 3.75 (dd, J=4.4, 14.3 Hz, 1H, CHH), 5.87 (dd, J=4.3, 10.5 Hz, 1H, NCH), 6.82-6.86 (m, 1H, Ar), 7.09-7.11 (m, 2H, Ar), 9.49 (br s, 1H, NH), 13C NMR (CDCl3) δ 14.61, 24.85, 41.54, 48.44, 54.34, 55.85, 64.43, 111.37, 112.34, 115.04, 118.11, 120.21, 124.85, 129.17, 130.96, 136.01, 137.52, 148.54, 149.65, 167.38, 169.09, 169.40; Anal Calcd for C22H24NO7S: C, 57.38; H, 5.25; N, 6.08. Found: C, 57.31; H, 5.34; N, 5.83.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: N-{2-[1-(4-Difluoromethoxy-3-ethoxy-phenyl)-2-methanesulfonyl-ethyl]-1,3-dioxo-2,3-dihydro -1H-isoindol-4-yl}-acetamide was prepared by the procedure of example 4 from 1-(4-difluoromethoxy-3-ethoxy-phenyl)-2-methanesulfonyl-ethylamine (0.6 g, 0.2 mmol), 3-acetamido-phthalic anhydride (0.4 g, 0.2 mmol) and sodium acetate (0.16 g, 0.2 mmol) in acetic acid (15 ml) to give N-{2-[1-(4-difluoromethoxy-3-ethoxy-phenyl)-2-methanesulfonyl-ethyl]-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl}-acetamide as white solid (0.4 g, 40%): mp 118–120° C.; 1H NMR (CDCl3) δ1.45 (t, J=7.0 Hz, 3H, CH3), 2.27(s, 3H, CH3CO), 2.92(s, 3H, SO2CH3), 3.66 (dd, J=3.8, 14 Hz, 1H, CH2), 4.11 (q, J=6.8 Hz, 2H, OCH2), 5.88–5.94 (m, 1H, NCH), 6.55 (t, JH-F=75 Hz, 1H, CF2H), 7.12–7.16 (m, 3H, Ar), 7.49 (d, J=7.5 Hz, 1H, Ar), 7.66 (t, J=7.5 Hz, 1H, Ar), 8.77 (d, J=8.5 Hz, 1H, Ar), 9.44 (s, 1H, NH); 13C NMR (CDCl3) δ 14.5, 24.9, 41.7, 48.3, 54.1, 64.9, 11.5, 113.6, 115.0, 115.8, 118.3, 120.0, 120.2, 123.1, 125.1, 130.9, 135.4, 136.2, 137.7, 140.4, 150.9, 167.4, 169.1, 169.4; Anal Calcd for C22H22F2N2O7S: C, 53.22; H, 4.47; N, 5.64. Found: C, 53.18; H, 4.20; N, 5.64.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-(4-Acetylamino-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-3-(4-difluoromethoxy-3-ethoxy -phenyl)-propionic acid was prepared by the procedure of Example 4 from 3-amino-3-(4-difluoromethoxy-3-ethoxy-phenyl)-propionic acid (2.7g, 13 mmol), 3-acetamido-phthalic anhydride (4.0 g, 14.5 mmol) and sodium acetate (1.2 g, 14.5 mmol) in acetic acid (50 ml) to give 3-(4-acetylamino-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-3-(4-difluoromethoxy-3-ethoxy-phenyl)-propionic acid (2.6 g, 45%) as yellowish solid. mp 89–91° C.; 1HNMR (CDCl3): δ 1.42 (t, J=7.5 Hz, 3H, OCH2CH3), 2.51 (s, 3H, CH3CO), 3.19 (dd, J=5.8, 15.5 Hz, 1H, CH2), 3.79 (dd, J=8.4, 15.5 Hz, 1H, CH2), 4.08 (q, J=7.5 Hz, 2H, OCH2CH3), 5.65–5.71 (m, 1H, CHN), 6.52 (t, JH-F=75 Hz, 1H, CF2H), 7.03–7.11 (m, 3H, Ar), 7.45 (d, J=7.5 Hz, 1H, Ar), 7.63 (t, J=7.5 Hz, 1H, Ar), 8.72 (d, J=8.3 Hz, 1H, Ar), 9.46 (s, 1H, NHCO). 13C NMR (CDCl3): δ 14.6, 24.8, 35.6, 50.3, 64.7, 98.4, 99.1, 111.8, 113.5, 115.2, 115.9, 118.2, 120.1, 120.2, 122.7, 125.0, 131.0, 136.0, 136.5, 137.4, 138.1, 140.0, 140.1, 140.2, 150.6, 167.4, 169.5, 169.7, 175.1; Anal. Calcd. for C22H20F2N2O7 +0.17 H2O: C, 56.77; H, 4.40; N, 6.06; H2O 0.66. Found: C, 56.60; H, 4.43; N, 6.02, H2O, 0.66.