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Pyrimidine-5-carboxylic acid → Pyrimidine-5-carboxylic acid {4-[4-(2-tert-butyl-6-cyclobutyl-pyrimidin-4-yl)-piperazin-1-yl]-butyl}-amide

HRID 219728
Notes
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Reaction equation

HRID 219728 reaction equation
[N:1]1[CH:6]=[C:5]([C:7]([OH:9])=O)[CH:4]=[N:3][CH:2]=1.[C:10]([C:14]1[N:19]=[C:18]([N:20]2[CH2:25][CH2:24][N:23]([CH2:26][CH2:27][CH2:28][CH2:29][NH2:30])[CH2:22][CH2:21]2)[CH:17]=[C:16]([CH:31]2[CH2:34][CH2:33][CH2:32]2)[N:15]=1)([CH3:13])([CH3:12])[CH3:11].C(N(C(C)C)CC)(C)C.OC1C2N=NNC=2C=CC=1.Cl.C(N=C=NCCCN(C)C)C>ClCCl>[C:10]([C:14]1[N:19]=[C:18]([N:20]2[CH2:21][CH2:22][N:23]([CH2:26][CH2:27][CH2:28][CH2:29][NH:30][C:7]([C:5]3[CH:4]=[N:3][CH:2]=[N:1][CH:6]=3)=[O:9])[CH2:24][CH2:25]2)[CH:17]=[C:16]([CH:31]2[CH2:34][CH2:33][CH2:32]2)[N:15]=1)([CH3:13])([CH3:11])[CH3:12]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 5

HCID 78346Pyrimidine-5-carboxylic acidHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride2×HCID 690260674-[4-(2-tert-Butyl-6-cyclobutyl-pyrimidin-4-yl)piperazin-1-yl]-butylamineHCID 178418300HCID 178418300, compound

Product 1

HCID 86635173
Pyrimidine-5-carboxylic acid {4-[4-(2-tert-butyl-6-cyclobutyl-pyrimidin-4-yl)-piperazin-1-yl]-butyl}-amide
Yield 44%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

0.1 g of pyrimidine-5-carboxylic acid (0.805 mmol) and 0.28 g of 4-[4-(2-tert-butyl-6-cyclobutyl-pyrimidin-4-yl)-piperazin-1-yl]-butylamine (0.805 mmol) were dissolved in 10 ml of dichloromethane. 0.46 g of diisopropylethylamine (3.17 mmol), 0.054 g of hydroxybenzotriazole (HOBt, 0.4 mmol), and 0.17 g of N-ethyl-N′-(3-dimethylamino-propyl)-carbodiimide hydrochloride (EDCl, 0.88 mmol) were added at 0° C. The reaction mixture was stirred for 16 h at room temperature. Then, 0.085 g of N-ethyl-N′-(3-dimethylaminopropyl)-carbodiimide hydrochloride were added and the reaction mixture was stirred for 4 h. The solvent was evaporated and the residue partitioned between and ethyl acetate and saturated aqueous sodium chloride. 4 ml of acetone were added to improve phase separation. The organic phase was dried over magnesium sulfate, filtered, and concentrated to dryness. The crude product was purified by chromatography on silica gel using ethyl acetate and ethyl acetate-methanol (5-10%). Evaporation of the solvent yielded 0.16 g of the title compound as a white solid.

Workup

  1. stirringthe reaction mixture was stirred for 4 h
  2. customThe solvent was evaporated
  3. customthe residue partitioned between and ethyl acetate and saturated aqueous sodium chloride
  4. addition4 ml of acetone were added
  5. customphase separation
  6. dry with materialThe organic phase was dried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated to dryness
  9. customThe crude product was purified by chromatography on silica gel
  10. customEvaporation of the solvent

Sources & evidence

ORD record
ord-668bd22b3e704b25b52ece33108b5099
Source dataset
uspto-grants-2012_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08202868B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes