Dichloromethane → 6-(5-chloro-2-fluoropyridin-4-yl)-3-methyl-N-(tetrahydro-2H-pyran-4-yl-methyl)pyrazine-2-amine

HRID 1623338Notes

Reaction equation

HRID 1623338 reaction equation
Cl[C:2]1[C:3]([NH:16][CH2:17][CH:18]2[CH2:23][CH2:22][O:21][CH2:20][CH2:19]2)=[N:4][C:5]([C:8]2[C:13]([Cl:14])=[CH:12][N:11]=[C:10]([F:15])[CH:9]=2)=[CH:6][N:7]=1.[CH3:24]B(O)O.C(=O)([O-])[O-].[Na+].[Na+].C(Cl)Cl>COCCOC>[Cl:14][C:13]1[C:8]([C:5]2[N:4]=[C:3]([NH:16][CH2:17][CH:18]3[CH2:23][CH2:22][O:21][CH2:20][CH2:19]3)[C:2]([CH3:24])=[N:7][CH:6]=2)=[CH:9][C:10]([F:15])=[N:11][CH:12]=1

Participants

6

Reactant 4

HCID 6344DichloromethaneHCID 10340Sodium CarbonateHCID 139377Methylboronic AcidHCID 866506283-chloro-6-(5-chloro-2-fluoropyridin-4-yl)-N-((tetrahydro-2H-pyran-4-yl)methyl)pyrazin-2-amine

Product 1

HCID 669371456-(5-chloro-2-fluoropyridin-4-yl)-3-methyl-N-(tetrahydro-2H-pyran-4-yl-methyl)pyrazine-2-amineYield 191.6%

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
105 °C

Procedure

3-chloro-6-(5-chloro-2-fluoropyridin-4-yl)-N-((tetrahydro-2H-pyran-4-yl)methyl)pyrazin-2-amine (0.0275 g, 0.077 mmol), methylboronic acid (0.014 g, 0.231 mmol), and sodium carbonate (0.100 ml, 0.200 mmol, 2M aq solution) were dissolved in DME (1.0 ml). The solution was then degassed by sparging with argon for 5 min. It was then treated with PdCl2(dppf).CH2Cl2 adduct (0.013 g, 0.015 mmol). The reaction mixture was then heated in the microwave at 105° C. for 20 min. More of the above reagents in the same amounts were added to the reaction mixture and heating in the microwave was continued at 115° C. for 20 min. The reaction mixture was allowed to cool to ambient temperature. It was then filtered through a pad of Celite. The filtrate was concentrated in vacuo to yield 0.0497 g of a mixture of 6-(5-chloro-2-fluoropyridin-4-yl)-3-methyl-N-((tetrahydro-2H-pyran-4-yl)pyrazine-2-amine and 6-(2-fluoro-5-methylpyridin-4-yl)-3-methyl-N-((tetrahydro-2H-pyran-4-yl_methyl)pyrazine-2-amine.

Workup

  1. customThe solution was then degassed
  2. customby sparging with argon for 5 min
  3. additionIt was then treated with PdCl2(dppf)
  4. additionMore of the above reagents in the same amounts were added to the reaction mixture
  5. temperatureheating in the microwave
  6. temperatureto cool to ambient temperature
  7. filtrationIt was then filtered through a pad of Celite
  8. concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-97a8cac069334d96bca3f591ef6d8eec
Source dataset
uspto-grants-2014_07
Patent number
US08778951B2

Reaction notes

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