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Sodium Carbonate → (S)-4-(3-amino-6-(tetrahydro-2H-pyran-4-yl)pyrazin-2-yl)-N-(2-hydroxy-1-phenylethyl)benzamide

HRID 595790
Notes
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Reaction equation

HRID 595790 reaction equation
Br[C:2]1[C:3]([NH2:14])=[N:4][CH:5]=[C:6]([CH:8]2[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)[N:7]=1.[OH:15][CH2:16][C@@H:17]([NH:24][C:25](=[O:41])[C:26]1[CH:31]=[CH:30][C:29](B2OC(C)(C)C(C)(C)O2)=[CH:28][CH:27]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.O1CCOCC1.C([O-])([O-])=O.[Na+].[Na+]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].CCOC(C)=O>[NH2:14][C:3]1[C:2]([C:29]2[CH:30]=[CH:31][C:26]([C:25]([NH:24][C@@H:17]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)[CH2:16][OH:15])=[O:41])=[CH:27][CH:28]=2)=[N:7][C:6]([CH:8]2[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[CH:5][N:4]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 10340Sodium CarbonateHCID 312751,4-DioxaneHCID 1180456623-bromo-5-(tetrahydro-2H-pyran-4-yl)pyrazin-2-amineHCID 123160895(S)-N-(2-hydroxy-1-phenylethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide

Product 1

HCID 118045476(S)-4-(3-amino-6-(tetrahydro-2H-pyran-4-yl)pyrazin-2-yl)-N-(2-hydroxy-1-phenylethyl)benzamide

Reagents, catalysts & solvents 2

HCID 44119782Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
120 °C

Procedure

To a solution of 3-bromo-5-(tetrahydro-2H-pyran-4-yl)pyrazin-2-amine (154 mg, 0.418 mmol), (S)—N-(2-hydroxy-1-phenylethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (90 mg, 0.349 mmol), and PdCl2(dppf) (25.5 mg, 0.035 mmol) was added dioxane (2.3 mL) and 2 M Na2CO3 solution (1.163 mL). The reaction mixture was heated at the microwave synthesizer (120° C., 10 min). The reaction mixture was worked up with EtOAc. The organic layer was washed with water and brine, dried over anhydrous sodium sulfate, filtered off, and concentrated in vacuo. The crude product was purified by prep HPLC. The pure fractions were combined, free-based with sodium carbonate solution, and extracted with EtOAc. The organic layer was dried over anhydrous sodium sulfate, filtered off, and dried in vacuo. The pure solid was dissolved in MeCN/water (1:1, 6 mL) and lyophilized yielding (S)-4-(3-amino-6-(tetrahydro-2H-pyran-4-yl)pyrazin-2-yl)-N-(2-hydroxy-1-phenylethyl)benzamide as free base (46%). LCMS (m/z): 419.2 (MH+), 0.58 min; 1H NMR (400 MHz, DMSO-d6) δ ppm 8.74 (d, J=12 Hz, 1H), 7.99 (d, J=8 Hz, 2H), 7.88 (s, 1H), 7.79 (d, J=12 Hz, 2H), 7.37 (d, J=8 Hz, 2H), 7.29 (m, 2H), 7.22 (m, 1H), 5.99 (bs, 1H), 5.07 (m, 1H), 3.91 (m, 2H), 3.67 (m, 2H), 3.41 (m, 2H), 2.82 (m, 1H), 1.72 (m, 4H).

Workup

  1. washThe organic layer was washed with water and brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationfiltered off
  4. concentrationconcentrated in vacuo
  5. customThe crude product was purified by prep HPLC
  6. extractionextracted with EtOAc
  7. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  8. filtrationfiltered off
  9. customdried in vacuo
  10. dissolutionThe pure solid was dissolved in MeCN/water (1:1, 6 mL)

Sources & evidence

ORD record
ord-1c2355ca52f04926a5081f784c8007cd
Source dataset
uspto-grants-2016_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09242996B2

Reaction notes

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