Cesium carbonate → 2-((2S)-4-methyl-1-((5-vinyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)pentan-2-yl)isoindoline-1,3-dione

HRID 2369500Notes

Reaction equation

HRID 2369500 reaction equation
Cl[C:2]1[CH:3]=[CH:4][C:5]2[C:15]3[C:10](=[CH:11][N:12]=[CH:13][CH:14]=3)[CH:9]([CH:16]=[CH2:17])[O:8][C:6]=2[CH:7]=1.[OH:18][CH2:19][C@@H:20]([N:25]1[C:33](=[O:34])[C:32]2[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=2)[C:26]1=[O:35])[CH2:21][CH:22]([CH3:24])[CH3:23].C(P(C(C)(C)C)C1(C(C)C)CC(C(C)C)=CC(C(C)C)=C1C1C=CC=CC=1)(C)(C)C.C(=O)([O-])[O-].[Cs+].[Cs+]>C1(C)C=CC=CC=1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:23][CH:22]([CH3:24])[CH2:21][C@H:20]([N:25]1[C:26](=[O:35])[C:27]2[C:32](=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:33]1=[O:34])[CH2:19][O:18][C:2]1[CH:3]=[CH:4][C:5]2[C:15]3[C:10](=[CH:11][N:12]=[CH:13][CH:14]=3)[CH:9]([CH:16]=[CH2:17])[O:8][C:6]=2[CH:7]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 668498352-DI-Tert-Butylphosphino-2,4,6-TriisopropylbiphenylHCID 713789222-[(2S)-1-Hydroxy-4-methylpentan-2-yl]-1H-isoindole-1,3(2H)-dioneHCID 866959038-chloro-5-vinyl-5H-chromeno[3,4-c]pyridine

Product 1

HCID 866959042-((2S)-4-methyl-1-((5-vinyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)pentan-2-yl)isoindoline-1,3-dioneYield 80.4%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 1140TolueneSolvent

Conditions

Temperature
80 °C

Procedure

To a stirred suspension of 8-chloro-5-vinyl-5H-chromeno[3,4-c]pyridine (0.2 g, 0.821 mmol), (S)-2-(1-hydroxy-4-methylpentan-2-yl)isoindoline-1,3-dione (0.609 g, 2.462 mmol), 2-di-tert-butylphosphino-2,4,6-triisopropylbiphenyl (0.209 g, 0.492 mmol), and cesium carbonate (0.401 g, 1.231 mmol) in toluene (25 mL) was added palladium (II) acetate (0.055 g, 0.246 mmol). Nitrogen gas was bubbled through the mixture for 5 min, and then the reaction mixture was heated to 80° C. for 14 h. The reaction was diluted with ethyl acetate (25 mL) and filtered through celite. The filtrate was washed with water (1×20 mL) and brine (1×20 mL), dried over sodium sulfate and concentrated under reduced pressure. The residue was purified via silica gel column chromatography (60% ethyl acetate in hexanes) to afford 2-((2S)-4-methyl-1-(5-vinyl-5H-chromeno[3,4-c]pyridin-8-yloxy)pentan-2-yl)isoindoline-1,3-dione (0.3 g, 0.660 mmol, 40% yield for three steps). LCMS (ESI) m/e 455.2 [(M+H)+, calcd for C28H27N2O4 455.2]; LC/MS retention time (Method C): tR=2.16 min.

Workup

  1. customNitrogen gas was bubbled through the mixture for 5 min
  2. additionThe reaction was diluted with ethyl acetate (25 mL)
  3. filtrationfiltered through celite
  4. washThe filtrate was washed with water (1×20 mL) and brine (1×20 mL)
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified via silica gel column chromatography (60% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-c92552f3140148438a479c57572d3b2a
Source dataset
uspto-grants-2014_04
Patent number
US08703953B2

Reaction notes

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