Water → 4-[4-(3-Chloro-benzylamino)-pyrimidin-2-yl]-piperazine-1-carboxylic Acid Tert-Butyl Ester

HRID 2417376Notes

Reaction equation

HRID 2417376 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:19]=[C:18](Cl)[CH:17]=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[Cl:21][C:22]1[CH:23]=[C:24]([CH:27]=[CH:28][CH:29]=1)[CH2:25][NH2:26].C(=O)([O-])[O-].[K+].[K+].O>C(O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:19]=[C:18]([NH:26][CH2:25][C:24]3[CH:27]=[CH:28][CH:29]=[C:22]([Cl:21])[CH:23]=3)[CH:17]=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 77802Benzenemethanamine, 3-chloro-HCID 46738270tert-Butyl 4-(4-chloropyrimidin-2-yl)piperazine-1-carboxylate

Product 1

HCID 695963154-[4-(3-Chloro-benzylamino)-pyrimidin-2-yl]-piperazine-1-carboxylic Acid Tert-Butyl Ester

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 4-(4-chloro-pyrimidin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester I-2a (100 mg, 0.33 mmol), 3-chlorobenzylamine (0.65 mL, 5.3 mmol) and potassium carbonate (71 mg, 0.67 mmol) in ethanol (5 mL) was heated at reflux for 24 h. The reaction mixture was cooled to room temperature, poured into H2O (15 mL) and extracted with EtOAc (2×18 mL). The combined organic extracts were washed with H2O (2×10 mL), brine, dried (Na2SO4) and concentrated in vacuo. The residue was purified by chromatography using 40% EtOAc in hexane as an eluting solvent to afford the title compound I-4a (93 mg) as a colorless oil.

Workup

  1. temperatureat reflux for 24 h
  2. extractionextracted with EtOAc (2×18 mL)
  3. washThe combined organic extracts were washed with H2O (2×10 mL), brine
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by chromatography

Sources & evidence

ORD record
ord-0ab041d8bf584391a1c8df6be9c2ba1c
Source dataset
uspto-grants-2004_11
Patent number
US06825198B2

Reaction notes

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