Ethyl Acetate → 5-methylsulfanyl-pyridine-2-carboxylic acid [2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-amide

HRID 331587Notes

Reaction equation

HRID 331587 reaction equation
[CH3:1][S:2][C:3]1[CH:4]=[CH:5][C:6]([C:9]([OH:11])=O)=[N:7][CH:8]=1.C1N=CN(C(N2C=NC=C2)=O)C=1.Cl.[NH2:25][CH2:26][C:27]1[CH:28]=[C:29]2[C:33](=[CH:34][CH:35]=1)[C:32](=[O:36])[N:31]([C:37]1([CH3:45])[CH2:42][CH2:41][C:40](=[O:43])[NH:39][C:38]1=[O:44])[C:30]2=[O:46].CCOC(C)=O>CN(C)C=O>[CH3:45][C:37]1([N:31]2[C:30](=[O:46])[C:29]3[C:33](=[CH:34][CH:35]=[C:27]([CH2:26][NH:25][C:9]([C:6]4[CH:5]=[CH:4][C:3]([S:2][CH3:1])=[CH:8][N:7]=4)=[O:11])[CH:28]=3)[C:32]2=[O:36])[CH2:42][CH2:41][C:40](=[O:43])[NH:39][C:38]1=[O:44]

Participants

6

Reactant 4

HCID 8857Ethyl AcetateHCID 682631,1'-CarbonyldiimidazoleHCID 127827632-Pyridinecarboxylic acid, 5-(methylthio)-HCID 670232045-Aminomethyl-2-(3-methyl-2,6-dioxo-piperidin-3-yl)isoindole-1,3-dione hydrochloride

Product 1

HCID 866307675-methylsulfanyl-pyridine-2-carboxylic acid [2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-amideYield 57.5%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
40 °C

Procedure

A stirred mixture of 5-methylsulfanyl-pyridine-2-carboxylic acid (0.34 g, 2.00 mmol) and CDI (0.34 g, 2.10 mmol) in N,N-dimethylformamide (20 mL) was heated to 40° C. under nitrogen. After 2 h, 5-aminomethyl-2-(3-methyl-2,6-dioxo-piperidin-3-yl)isoindole-1,3-dione hydrochloride (0.68 g, 2.00 mmol) was added and the mixture was heated at 40° C. for 2 h. The mixture was cooled to rt and EtOAc (75 mL) was added. The organic layer was washed with sat. aq. NaHCO3 (3×100 mL) then concentrated in vacuo. The crude residue was purified by column chromatography (0-5% gradient, MeOH/CH2Cl2, 0-5% gradient, product eluted after 4.7 min). The product fractions were combined, concentrated and the residue was triturated in MeCN (50 mL) for 1.5 h. The product was isolated by filtration and dried in vacuo to give 5-methylsulfanyl-pyridine-2-carboxylic acid [2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-amide as a white solid (0.52 g, 57% yield): HPLC: Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 40/60 CH3CN/0.1% H3PO4, 4.89 min (98.54%); mp: 210-212° C.; 1H NMR (DMSO-d6) δ 1.88 (s, 3H), 1.97-2.12 (m, 1H), 2.53-2.78 (m, 6H), 4.62 (d, J=6.2 Hz, 2H), 7.68-7.90 (m, 4H), 7.91-8.04 (m, 1H), 8.52 (d, J=1.7 Hz, 1H), 9.51 (t, J=6.3 Hz, 1H), 11.01 (s, 1H); 13C NMR (DMSO-d6) δ 13.93, 21.02, 28.57, 29.09, 42.35, 58.73, 121.75, 122.05, 123.15, 129.59, 131.34, 133.53, 133.82, 139.65, 145.00, 145.90, 147.39, 164.07, 167.73, 167.88, 172.15; LCMS: MH=453; Anal Calcd for C22H20N4O5S: C, 58.40; H, 4.46; N, 12.38. Found: C, 58.24; H, 4.33; N, 12.16.

Workup

  1. temperaturethe mixture was heated at 40° C. for 2 h
  2. temperatureThe mixture was cooled to rt
  3. washThe organic layer was washed with sat. aq. NaHCO3 (3×100 mL)
  4. concentrationthen concentrated in vacuo
  5. customThe crude residue was purified by column chromatography (0-5% gradient, MeOH/CH2Cl2, 0-5% gradient, product eluted after 4.7 min)
  6. concentrationconcentrated
  7. customthe residue was triturated in MeCN (50 mL) for 1.5 h
  8. customThe product was isolated by filtration
  9. customdried in vacuo

Sources & evidence

ORD record
ord-68a4b435771346229eed83e6a673dbe2
Source dataset
uspto-grants-2014_11
Patent number
US08877780B2

Reaction notes

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