Oxygen → (4-(1-(3-Amino-1-cyclopentyl-3-oxopropyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate

HRID 1467438Notes

Reaction equation

HRID 1467438 reaction equation
[C:1]([O:7][CH2:8][N:9]1[C:13]2[N:14]=[CH:15][N:16]=[C:17]([C:18]3[CH:19]=[N:20][N:21](/[C:23](/[CH:28]4[CH2:32][CH2:31][CH2:30][CH2:29]4)=[CH:24]\[C:25]([NH2:27])=[O:26])[CH:22]=3)[C:12]=2[CH:11]=[CH:10]1)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].O=O.[H][H]>>[C:1]([O:7][CH2:8][N:9]1[C:13]2[N:14]=[CH:15][N:16]=[C:17]([C:18]3[CH:19]=[N:20][N:21]([CH:23]([CH:28]4[CH2:32][CH2:31][CH2:30][CH2:29]4)[CH2:24][C:25]([NH2:27])=[O:26])[CH:22]=3)[C:12]=2[CH:11]=[CH:10]1)(=[O:6])[C:2]([CH3:4])([CH3:5])[CH3:3]

Participants

4

Reactant 3

HCID 977OxygenHCID 59420169(Z)-(4-(1-(3-Amino-1-cyclopentyl-3-oxoprop-1-enyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalateHCID 178418361HCID 178418361, compound2×

Product 1

HCID 59420164(4-(1-(3-Amino-1-cyclopentyl-3-oxopropyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate

Procedure

General screening procedure for asymmetric hydrogenation using the substrate, (Z)-(4-(1-(3-amino-1-cyclopentyl-3-oxoprop-1-enyl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate (10) to afford optically enriched product, (4-(1-(3-amino-1-cyclopentyl-3-oxopropyl]-1H-pyrazol-4-yl}-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate ((R)-11 or (S)-11): A 300 mL-volume autoclave with glass vial (20 mL) was charged with the substrate (10), the catalyst (metal, ligand, and catalyst precursor), and oxygen-free solvent (4-6 mL) under nitrogen. This autoclave was charged with hydrogen gas to the desired pressure and stirred at room temperature or heated with oil bath. After hydrogen gas was released, the reaction mixture was concentrated under reduced pressure. The residue was purified by eluting through a silica gel pad using a mixture of ethyl acetate and methanol (v/v=9/1) to afford product, (4-(1-(3-amino-1-cyclopentyl-3-oxopropyl]-1H-pyrazol-4-yl}-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate ((R)-11 or (S)-11), for chemical conversion (HPLC and chiral HPLC), LC/MS and NMR spectroscopy and enantiomeric excess (% ee by chiral HPLC) determination.

Workup

  1. temperatureheated with oil bath
  2. concentrationthe reaction mixture was concentrated under reduced pressure
  3. customThe residue was purified
  4. washby eluting through a silica gel pad
  5. additiona mixture of ethyl acetate and methanol (v/v=9/1)

Sources & evidence

ORD record
ord-90d3829fc5224687a15f53d2d8cfdda9
Source dataset
uspto-grants-2015_04
Patent number
US09000161B2

Reaction notes

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