Sodium Chloride → HCID 11439472, compound

HRID 353162Notes

Reaction equation

HRID 353162 reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([Cl:12])=[N:4][N:3]=1.C(N(CC)CC)C.[C:20]([O:24][C:25]([N:27]1[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]1)=[O:26])([CH3:23])([CH3:22])[CH3:21].[Cl-].[Na+]>CN1CCCC1=O.O>[C:20]([O:24][C:25]([N:27]1[CH2:32][CH2:31][N:30]([C:2]2[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]([Cl:12])=[N:4][N:3]=2)[CH2:29][CH2:28]1)=[O:26])([CH3:23])([CH3:21])[CH3:22]

Participants

7

Reactant 4

HCID 5234Sodium ChlorideHCID 8471TriethylamineHCID 784901,4-DichlorophthalazineHCID 143452tert-Butyl piperazine-1-carboxylate

Product 1

HCID 11439472HCID 11439472, compoundYield 76%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 13387N-methyl-2-pyrrolidoneSolvent

Conditions

Temperature
70 °C

Procedure

To a solution of 2.09 g (10.5 mmol) of commercially available 1,4-dichlorophthalazine in 20 ml of N-methylpyrrolidone were added 7.32 ml (52.5 mmol) of triethylamine and 2.35 g (12.6 mmol) of N-tert-butoxycarbonylpiperazine, followed by heating at 70° C. with stirring in an atmosphere of argon for 2 hours. The reaction mixture was allowed to cool to room temperature and then poured into water, and sodium chloride was added thereto. The precipitated crystals were collected by filtration, washed with water, and dried, followed by purification by silica gel chromatography to give 2.77 g (76%) of 4-(4-chloro-1-phthalazinyl)-1-piperazinecarboxylic acid tert-butyl ester.

Workup

  1. temperatureto cool to room temperature
  2. additionwas added
  3. filtrationThe precipitated crystals were collected by filtration
  4. washwashed with water
  5. customdried
  6. customfollowed by purification by silica gel chromatography

Sources & evidence

ORD record
ord-736d19d6137343399bb9bcaceac702d8
Source dataset
uspto-grants-2004_06
Patent number
US06750218B2

Reaction notes

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