Water → tert-butyl (1S,3R)-3-(2-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarbonyl)cyclopentylcarbamate

HRID 1854437Notes

Reaction equation

HRID 1854437 reaction equation
[NH:1]([C:3]1[N:4]=[C:5]2[CH:11]=[CH:10][N:9]([S:12]([C:15]3[CH:21]=[CH:20][C:18]([CH3:19])=[CH:17][CH:16]=3)(=[O:14])=[O:13])[C:6]2=[N:7][CH:8]=1)[NH2:2].[C:22]([O:26][C:27]([NH:29][C@H:30]1[CH2:34][CH2:33][C@@H:32]([C:35](O)=[O:36])[CH2:31]1)=[O:28])([CH3:25])([CH3:24])[CH3:23].CCN=C=NCCCN(C)C.Cl.O>C(Cl)Cl>[S:12]([N:9]1[C:6]2=[N:7][CH:8]=[C:3]([NH:1][NH:2][C:35]([C@@H:32]3[CH2:33][CH2:34][C@H:30]([NH:29][C:27](=[O:28])[O:26][C:22]([CH3:24])([CH3:23])[CH3:25])[CH2:31]3)=[O:36])[N:4]=[C:5]2[CH:11]=[CH:10]1)([C:15]1[CH:21]=[CH:20][C:18]([CH3:19])=[CH:17][CH:16]=1)(=[O:13])=[O:14]

Participants

6

Reactant 4

HCID 962WaterHCID 1512526(1R,3S)-3-[(2-methylpropan-2-yl)oxycarbonylamino]cyclopentane-1-carboxylic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 580098102-Hydrazinyl-5-tosyl-5H-pyrrolo[2,3-b]pyrazine

Product 1

HCID 58009789tert-butyl (1S,3R)-3-(2-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarbonyl)cyclopentylcarbamateYield 99.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To mixture of 2-hydrazinyl-5-tosyl-5H-pyrrolo[2,3-b]pyrazine (2.50 g, 8.24 mmol) and (1R,3S)-3-(tert-butoxycarbonylamino)cyclopentanecarboxylic acid (2.08 g, 9.07 mmol, Peptech) in DCM (30 mL) was added EDC.HCl (1.90 g, 9.89 mmol). After stirring for about 4.5 h at ambient temperature, water (30 mL) was added and the layers were separated. The aqueous layer was then extracted with EtOAc (15 mL). The combined organic layers were washed with brine, dried over anhydrous MgSO4, filtered, and concentrated under reduced pressure. The crude material was dissolved in DCM (15 mL) and purified by silica gel chromatography eluting with a gradient of 40-100% EtOAc in heptane to give tert-butyl (1S,3R)-3-(2-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarbonyl)cyclopentylcarbamate (4.20 g, 97%): LC/MS (Table 2, Method a) Rt=2.27 min; MS m/z: 515 (M+H)+.

Workup

  1. customthe layers were separated
  2. extractionThe aqueous layer was then extracted with EtOAc (15 mL)
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. dissolutionThe crude material was dissolved in DCM (15 mL)
  8. custompurified by silica gel chromatography
  9. washeluting with a gradient of 40-100% EtOAc in heptane

Sources & evidence

ORD record
ord-4a5698f36518425aa64d873a7f18367d
Source dataset
uspto-grants-2015_02
Patent number
US08962629B2

Reaction notes

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