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

HRID 2403264Notes

Reaction equation

HRID 2403264 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-ec17a0bda749446ab6d0c0f18ef41e54
Source dataset
uspto-grants-2014_08
Patent number
US08802672B2

Reaction notes

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