2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → 3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanol

HRID 1969623Notes

Reaction equation

HRID 1969623 reaction equation
[S:1]([N:11]1[C:15]2[N:16]=[CH:17][C:18]3[N:19]([CH:20]=[N:21][N:22]=3)[C:14]=2[CH:13]=[CH:12]1)([C:4]1[CH:10]=[CH:9][C:7]([CH3:8])=[CH:6][CH:5]=1)(=[O:3])=[O:2].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.Cl[C:57]1[C:58](=[O:69])[C:59](C#N)=[C:60]([C:65]#N)[C:61](=O)[C:62]=1Cl>C(Cl)Cl.O>[CH2:61]([CH:60]1[CH:65]([C:20]2[N:19]3[C:14]4[CH:13]=[CH:12][N:11]([S:1]([C:4]5[CH:10]=[CH:9][C:7]([CH3:8])=[CH:6][CH:5]=5)(=[O:2])=[O:3])[C:15]=4[N:16]=[CH:17][C:18]3=[N:22][N:21]=2)[CH2:57][CH:58]([OH:69])[CH2:59]1)[CH3:62]

Participants

7

Reactant 4

HCID 67752,3-Dichloro-5,6-dicyano-1,4-benzoquinoneHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 585574426-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazine

Product 1

HCID 585575563-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanolYield 75%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To 2-ethyl-4-(4-methoxybenzyloxy)cyclopentyl)-6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazine (1.153 g, 2.11 mmol, prepared using Z from Preparation #EE.1, A from Example #1, Step D, HATU, and TEA, B with DIEA) in DCM (18 mL) and water (3.5 mL) was added 2,3-dichloro-5,6-dicyano-p-benzoquinone (0.576 g, 2.54 mmol). The reaction mixture was stirred at ambient temperature for about 16 h. The solid was removed by filtration while washing with DCM (150 mL). The organic layer was separated and washed with saturated aqueous NaHCO3 (2×40 mL) and brine (40 mL), dried over anhydrous MgSO4, filtered, and concd under reduced pressure. The residue was purified using silica gel chromatography (40 g) eluting with a gradient of 30-100% EtOAc in DCM to give 3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanol (0.672 g, 75%): LC/MS (Table 1, Method b) Rt=2.09 min; MS m/z: 426 (M+H)+.

Workup

  1. customfrom Preparation #EE.1
  2. customThe solid was removed by filtration
  3. washwhile washing with DCM (150 mL)
  4. customThe organic layer was separated
  5. washwashed with saturated aqueous NaHCO3 (2×40 mL) and brine (40 mL)
  6. dry with materialdried over anhydrous MgSO4
  7. filtrationfiltered
  8. customThe residue was purified
  9. washeluting with a gradient of 30-100% EtOAc in DCM

Sources & evidence

ORD record
ord-09dffd1d1a6048ddb97e3641709f70ea
Source dataset
uspto-grants-2013_04
Patent number
US08426411B2

Reaction notes

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