Methanol → trans-4-[2-(4-Cyclobutylpiperazine-1-carbonyl)cyclopropyl]benzonitrile

HRID 561074Notes

Reaction equation

HRID 561074 reaction equation
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([C@@H:9]2[CH2:11][C@H:10]2[C:12]([OH:14])=O)=[CH:5][CH:4]=1)#[N:2].[CH2:15](N(C(C)C)C(C)C)[CH3:16].CN(C(ON1N=[N:39][C:34]2[CH:35]=[CH:36][CH:37]=[N:38][C:33]1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[CH3:48]O>CN(C=O)C.C(Cl)Cl>[CH:37]1([N:38]2[CH2:33][CH2:34][N:39]([C:12]([C@@H:10]3[CH2:11][C@H:9]3[C:6]3[CH:5]=[CH:4][C:3]([C:1]#[N:2])=[CH:8][CH:7]=3)=[O:14])[CH2:16][CH2:15]2)[CH2:36][CH2:35][CH2:48]1

Participants

7

Reactant 4

HCID 887MethanolHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 67330003(1R,2R)-2-(4-cyanophenyl)cyclopropane-1-carboxylic acid

Product 1

HCID 25196788trans-4-[2-(4-Cyclobutylpiperazine-1-carbonyl)cyclopropyl]benzonitrileYield 68.8%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 21C (0.75 g, 4.01 mmol), 1-cyclobutylpiperazine, 2HCl (0.854 g, 4.01 mmol) and N-Ethyldiisopropylamine (2.79 mL, 16.03 mmol) in 20 ml of DMF at RT was added in portions HATU (1.523 g, 4.01 mmol). This was stirred for 60 min. then concentrated. The reaction was partitioned between EtOAc and 1 N HCl. The aq. layer was extracted 3× with EtOAc then made basic with 2 N NaOH. The aq. layer was extracted 3× with EtOAc and the combined organic layers were washed with brine then dried over MgSO4, filtered and concentrated. Purification was performed using a gradient of 0% to 10% MeOH in DCM. A second purification was necessary using first 100% EtOAc then 2-5% MeOH in DCM providing 0.853 g of 21D (68.8% yield).

Workup

  1. concentrationthen concentrated
  2. customThe reaction was partitioned between EtOAc and 1 N HCl
  3. extractionThe aq. layer was extracted 3× with EtOAc
  4. extractionThe aq. layer was extracted 3× with EtOAc
  5. washthe combined organic layers were washed with brine
  6. dry with materialthen dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customPurification
  10. customA second purification

Sources & evidence

ORD record
ord-87aa62754897419a94f8b2da8e7f7df5
Source dataset
uspto-grants-2011_11
Patent number
US08063215B2

Reaction notes

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