Diisopropylethylamine → HCID 86688376, compound

HRID 2038912Notes

Reaction equation

HRID 2038912 reaction equation
[Br:1][C:2]1[NH:6][C:5]([C@@H:7]2[CH2:11][C@H:10]([CH3:12])[CH2:9][N:8]2[C:13]([O:15]C(C)(C)C)=O)=[N:4][CH:3]=1.[CH3:20][O:21][C:22]([NH:24][C@@H:25]([C@@H:29]([CH3:32])[CH2:30][CH3:31])C(O)=O)=[O:23].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C.C([O-])(O)=O.[Na+]>Cl.CCO.CN(C=O)C>[Br:1][C:2]1[NH:6][C:5]([C@@H:7]2[CH2:11][C@H:10]([CH3:12])[CH2:9][N:8]2[C:13](=[O:15])[C@@H:25]([NH:24][C:22](=[O:23])[O:21][CH3:20])[C@@H:29]([CH3:32])[CH2:30][CH3:31])=[N:4][CH:3]=1

Participants

9

Reactant 5

HCID 81531DiisopropylethylamineHCID 516892Sodium BicarbonateHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 28378062L-Isoleucine, N-(methoxycarbonyl)-HCID 69675472HCID 69675472, compound

Product 1

HCID 86688376HCID 86688376, compoundYield 1,786.5%

Reagents, catalysts & solvents 3

HCID 313Hydrochloric AcidSolventHCID 702EthanolSolventHCID 6228DimethylformamideSolvent

Procedure

(2S,4S)-tert-butyl 2-(5-bromo-1H-imidazol-2-yl)-4-methylpyrrolidine-1-carboxylate (100 mg, 0.13 mmol) in 1.25 N HCl in EtOH (15 mL) was heated to 50° C. for 3 h and then concentrated under reduced pressure. The crude residue was treated with (2S,3S)-2-(methoxycarbonylamino)-3-methylpentanoic acid (625 mg, 3.30 mmol), HATU (1.05 g, 2.77 mmol) and DMF (10 mL), then DIPEA (1.33 mL, 7.62 mmol) was added dropwise. After 2h, the mixture was poured into saturated aqueous NaHCO3 and then extracted with EtOAc. The organic phase was washed successively with 5% aqueous LiCl and Brine. The organics were dried over Na2SO4, filtered and concentrated under reduced pressure. The crude residue was purified by silica column chromatography (30 to 90% of 10% MeOH/EtoAc to Hexanes) afforded methyl (2S,3S)-1-((2S,4S)-2-(5-bromo-1H-imidazol-2-yl)-4-methylpyrrolidin-1-yl)-3-methyl-1-oxopentan-2-ylcarbamate (932 mg, 81%).

Workup

  1. concentrationconcentrated under reduced pressure
  2. extractionextracted with EtOAc
  3. washThe organic phase was washed successively with 5% aqueous LiCl and Brine
  4. dry with materialThe organics were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude residue was purified by silica column chromatography (30 to 90% of 10% MeOH/EtoAc to Hexanes)

Sources & evidence

ORD record
ord-9b03d1b74bb84d77b5807abc03f6967c
Source dataset
uspto-grants-2013_11
Patent number
US08575135B2

Reaction notes

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