3,3-Dimethylbutanoyl chloride → HCID 57730474, compound

HRID 63454Notes

Reaction equation

HRID 63454 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[C:9](=[O:13])[N:8]([CH:14]1[CH2:19][CH2:18][C:17](=[O:20])[NH:16][C:15]1=[O:21])[C:7]2=[O:22].[C:23]([CH2:27][C:28](Cl)=[O:29])([CH3:26])([CH3:25])[CH3:24].CCN(C(C)C)C(C)C>C(Cl)Cl>[O:21]=[C:15]1[CH:14]([N:8]2[C:7](=[O:22])[C:6]3[C:10](=[CH:11][CH:12]=[C:4]([CH2:3][NH:2][C:28](=[O:29])[CH2:27][C:23]([CH3:26])([CH3:25])[CH3:24])[CH:5]=3)[C:9]2=[O:13])[CH2:19][CH2:18][C:17](=[O:20])[NH:16]1

Participants

5

Reactant 3

HCID 815143,3-Dimethylbutanoyl chlorideHCID 81531DiisopropylethylamineHCID 670197065-(Aminomethyl)-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione hydrochloride

Product 1

HCID 57730474HCID 57730474, compoundYield 34%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred mixture of 5-aminomethyl-2-(2,6-dioxo-piperidin-3-yl)-isoindole-1,3-dione hydrochloride (0.97 g, 3.00 mmol) and t-butylacetyl chloride (0.40 g, 3.00 mmol) in CH2Cl2 (20 mL), was added DIPEA (1.05 mL, 6.00 mmol) at room temperature under nitrogen. After 18 h, solution was washed with dil. aq. HCl (2×50 mL), water (2×50 mL), dried (MgSO4) and then concentrated. The crude product was purified by column chromatography (0-5% MeOH CH2Cl2). The product fractions were combined, concentrated and triturated in EtOAc for 18 h. The product was dried in vacuo to give N-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-3,3-dimethyl-butyramide as a white solid (0.39 g, 34% yield): HPLC: Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 40/60 CH3CN/0.1% H3PO4, 3.13 min (95.97%); mp: 232-234° C.; 1H NMR (DMSO-d6) δ 0.97 (s, 9H, CH3, CH3, CH3), 1.97-2.17 (m, 3H, CHH, CH2), 2.53-2.69 (m, 2H, CHH, CHH), 2.77-3.01 (m, 1H, CHH), 4.43 (d, J=5.9 Hz, 2H, CH2), 5.14 (dd, J=5.4, 12.7 Hz, 1H, CH), 7.71-7.83 (m, 2H, Ar), 7.89 (d, J=7.6 Hz, 1H, Ar), 8.46 (t, J=5.9 Hz, 1H, NH), 11.12 (s, 1H, NH); 13C NMR (DMSO-d6) δ 21.99, 29.68, 30.52, 30.93, 41.87, 48.66, 48.99, 121.91, 123.45, 129.69, 131.57, 133.41, 147.87, 166.97, 167.10, 169.83, 171.11, 172.73; LCMS: MH=386; Anal Calcd for C20H23N3O5: C, 62.33; H, 6.02; N, 10.90. Found: C, 61.96; H, 5.95; N, 10.75.

Workup

  1. washsolution was washed with dil. aq. HCl (2×50 mL), water (2×50 mL)
  2. dry with materialdried (MgSO4)
  3. concentrationconcentrated
  4. customThe crude product was purified by column chromatography (0-5% MeOH CH2Cl2)
  5. concentrationconcentrated
  6. customtriturated in EtOAc for 18 h
  7. customThe product was dried in vacuo

Sources & evidence

ORD record
ord-1c8f2d4cabdd4c4098bd672c850cfae8
Source dataset
uspto-grants-2016_09
Patent number
US09447070B2

Reaction notes

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