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Sodium Carbonate → tert-butyl 4-(5-amino-6-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 1959416
Notes
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Reaction equation

HRID 1959416 reaction equation
Br[C:2]1[N:3]=[C:4]([C:9]2[N:13]=[C:12]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[O:11][N:10]=2)[C:5]([NH2:8])=[N:6][CH:7]=1.[C:20]([O:24][C:25]([N:27]1[CH2:32][CH:31]=[C:30](B2OC(C)(C)C(C)(C)O2)[CH2:29][CH2:28]1)=[O:26])([CH3:23])([CH3:22])[CH3:21].C(=O)([O-])[O-].[Na+].[Na+]>CN(C=O)C.O.C(OCC)(=O)C>[NH2:8][C:5]1[N:6]=[CH:7][C:2]([C:30]2[CH2:31][CH2:32][N:27]([C:25]([O:24][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:26])[CH2:28][CH:29]=2)=[N:3][C:4]=1[C:9]1[N:13]=[C:12]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[O:11][N:10]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 594722055-Bromo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-ylamine

Product 1

HCID 66744707tert-butyl 4-(5-amino-6-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylateYield 88.6%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

5-bromo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrazin-2-amine (150 mg, 0.4715 mmol), tert-butyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-1-carboxylate (189.5 mg, 0.6130 mmol) and sodium carbonate (707.0 μL of 2 M, 1.414 mmol) in DMF (1.500 mL) were heated to 120° C. for 45 min in the microwave. After this time the reaction mixture was diluted with water (5 mL) and ethyl acetate (5 mL) and the layers separated. Organic layer washed with water (3×5 mL), dried (MgSO4) and concentrated in vacuo to leave the title compound as a yellow/orange solid (175.6 mg, 88% yield). 1H NMR (400 MHz, DMSO) d 1.44 (s, 9H), 2.60 (m, 2H), 3.57 (m, 2H), 4.06 (m, 2H), 6.70 (s, 1H), 7.30 (br s, 2H), 7.69 (m, 2H), 7.77 (m, 1H), 8.25 (m, 2H) and 8.51 (1H, s) ppm; MS (ES+) 421.02

Workup

  1. customthe layers separated
  2. washOrganic layer washed with water (3×5 mL)
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-d3732b0b0185482192fb0f6d8cdb175b
Source dataset
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08410112B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes