Methanol → 3-Bromo-n-{2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-1,3-dioxoisoindolin-4-yl}propanamide

HRID 1661754Notes

Reaction equation

HRID 1661754 reaction equation
[CH2:1]([O:3][C:4]1[CH:5]=[C:6]([CH:12]([N:18]2[C:26](=[O:27])[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][C:24]=3[NH2:28])[C:19]2=[O:29])[CH2:13][S:14]([CH3:17])(=[O:16])=[O:15])[CH:7]=[CH:8][C:9]=1[O:10][CH3:11])[CH3:2].[Br:30][CH:31](C)[C:32](Cl)=O.[CH3:36][OH:37]>CCOCC>[Br:30][CH2:31][CH2:32][C:36]([NH:28][C:24]1[CH:23]=[CH:22][CH:21]=[C:20]2[C:25]=1[C:26](=[O:27])[N:18]([CH:12]([C:6]1[CH:7]=[CH:8][C:9]([O:10][CH3:11])=[C:4]([O:3][CH2:1][CH3:2])[CH:5]=1)[CH2:13][S:14]([CH3:17])(=[O:16])=[O:15])[C:19]2=[O:29])=[O:37]

Participants

5

Reactant 3

HCID 887MethanolHCID 979802-Bromopropanoyl chlorideHCID 98449131H-Isoindole-1,3(2H)-dione, 4-amino-2-[(1S)-1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-

Product 1

HCID 187583873-Bromo-n-{2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-1,3-dioxoisoindolin-4-yl}propanamideYield 80%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 2-[1′-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4-aminoisoindoline-1,3-dione (0.80 g, 1.9 mmol) and 2-bromopropionyl chloride (0.8 mL, 7.9 mmol) was heated at 100° C. for 30 min. The mixture was cooled to room temperature. Methanol (10 mL) was added to the mixture. The solvent was removed in vacuo to give an oil. The oil was stirred in ether (10 mL) for 1 day. The resulting suspension was filtered and the solid washed with ether to give 3-bromo-N-{2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-1,3-dioxoisoindolin-4-yl}propanamide as a yellow solid (0.84 g, 80% yield). A portion of the isolated bromide (620 mg, 1.2 mmol) and dimethylamine (2 mL, 2M in methanol, 4 mmol) was stirred at room temperature for 3 h. The resulting suspension was filtered and washed with methanol to yield the crude product as a yellow solid. The solid was purified by column chromatography to give 3-(dimethylamino)-N-{2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-1,3-dioxoisoindolin-4-yl}propanamide as a white solid (180 mg, 30% yield): mp, 163-165° C.; 1H NMR (CDCl3) δ 1.47 (t, J=6.9 Hz, 3H, CH3), 2.38 (s, 6H, CH3), 2.59 (t, J=5.7 Hz, 2H, CH2), 2.70 (t, J=5.9 Hz, 2H, CH2), 2.82 (s, 3H, CH3), 3.78-3.85 (m, 1H, CHH), 3.86 (s, 3H, CH3), 4.10 (q, J=7.0 Hz, 2H, CH2), 4.49 (dd, J=9.8, 14.6 Hz, 1H, CHH), 5.86 (dd, J=4.9, 9.7 Hz, 1H, NCH), 6.82-6.85 (m, 1H, Ar), 7.10-7.13 (m, 2H, Ar), 7.48 (d, J=7.2 Hz, 1H, Ar), 7.63 (t, J=7.5 Hz, 1H, Ar), 8.82 (d, J=8.4 Hz, 1H, Ar), 11.36 (s, 1H, NH); 13C NMR (CDCl3) δ 14.62, 34.85, 41.49, 44.65, 48.74, 54.31, 55.01, 55.88, 64.44, 111.43, 112.52, 115.99, 117.93, 120.39, 120.08, 129.52, 131.42, 135.59, 137.33, 148.55, 149.67, 168.00, 168.16, 171.86; Anal Calcd for C25H31N3O7S: C, 58.01; H, 6.04; N, 8.12. Found: C, 57.75; H, 5.86; N, 7.91.

Workup

  1. temperatureThe mixture was cooled to room temperature
  2. customThe solvent was removed in vacuo
  3. customto give an oil
  4. filtrationThe resulting suspension was filtered
  5. washthe solid washed with ether

Sources & evidence

ORD record
ord-0ac7b0f386e04e6a90c5e1b4fa158f36
Source dataset
uspto-grants-2011_10
Patent number
US08030343B2

Reaction notes

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