Potassium Carbonate → 4-(5,6-Dichloro-2-methylamino-pyrimidin-4-yl)-piperazine-1-carboxylic acid tert-butyl ester

HRID 254228Notes

Reaction equation

HRID 254228 reaction equation
[CH3:1][NH:2][C:3]1[N:8]=[C:7](Cl)[C:6]([Cl:10])=[C:5]([Cl:11])[N:4]=1.[C:12]([N:19]1[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]1)([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13].C(=O)([O-])[O-].[K+].[K+]>O.C(C(C)=O)C>[C:15]([O:14][C:12]([N:19]1[CH2:24][CH2:23][N:22]([C:7]2[C:6]([Cl:10])=[C:5]([Cl:11])[N:4]=[C:3]([NH:2][CH3:1])[N:8]=2)[CH2:21][CH2:20]1)=[O:13])([CH3:18])([CH3:16])[CH3:17]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 143452tert-Butyl piperazine-1-carboxylateHCID 15567730Methyl-(4,5,6-trichloro-pyrimidin-2-yl)-amine

Product 1

HCID 574437034-(5,6-Dichloro-2-methylamino-pyrimidin-4-yl)-piperazine-1-carboxylic acid tert-butyl esterYield 59%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6569Methyl Ethyl KetoneSolvent

Procedure

Methyl-(4,5,6-trichloro-pyrimidin-2-yl)-amine (2.8 g, 12.2 mmol), 1-Boc-piperazine (2.27 g, 12.2 mmol), potassium carbonate (0.84 g 6.1 mmol) in water (2.5 ml) and methyl ethyl ketone (50 ml) were refluxed for 12 hours. After cooling to room temperature the precipitate was filtered, and washed with water to give the title compound (2.6 g, 59%), melting point: 205-206° C.

Workup

  1. filtrationwas filtered
  2. washwashed with water

Sources & evidence

ORD record
ord-fadf1bc831af49ec96d6db440c5ddd2b
Source dataset
uspto-grants-2011_01
Patent number
US07875610B2

Reaction notes

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