2-Amino-5-hydroxypyridine → HCID 90410933, compound

HRID 626590Notes

Reaction equation

HRID 626590 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][N:3]=1.CC(C)([O-])C.[K+].Cl[C:16]1[CH:21]=[CH:20][N:19]=[C:18]([C:22]([NH:24][CH:25]2[CH2:30][CH2:29][N:28]([CH3:31])[CH2:27][CH2:26]2)=[O:23])[CH:17]=1>CC(N(C)C)=O.CCOC(C)=O>[NH2:1][C:2]1[N:3]=[CH:4][C:5]([O:8][C:16]2[CH:21]=[CH:20][N:19]=[C:18]([C:22]([NH:24][CH:25]3[CH2:26][CH2:27][N:28]([CH3:31])[CH2:29][CH2:30]3)=[O:23])[CH:17]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 42319722-Amino-5-hydroxypyridineHCID 23665647Potassium tert-butoxideHCID 43216632HCID 43216632, compound

Product 1

HCID 90410933HCID 90410933, compoundYield 47.3%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 31374DimethylacetamideSolvent2×

Procedure

A solution of 2-amino-5-hydroxypyridine (0.557 g, 5.06 mmol) in DMA (8.5 mL) was treated with potassium tert-butoxide (0.639 g, 5.69 mmol), stirred at RT for 1 h, treated with a solution of 4-chloro-N-(1-methylpiperidin-4-yl)picolinamide (1.07 g, 4.22 mmol) in DMA (8.5 mL) and stirred at RT for 20 h. The mixture was diluted with EtOAc, washed with 1N NaOH, then brine and the organic layer was dried over Na2SO4, concentrated to dryness and purified by silica gel chromatography (MeOH/DCM/NH4OH) to afford 4-((6-aminopyridin-3-yl)oxy)-N-(1-methylpiperidin-4-yl)picolinamide (0.654 g, 47%). 1H NMR (400 MHz, DMSO-d6): δ 8.49-8.48 (m, 2H), 7.81 (d, J=2.9 Hz, 1H), 7.33 (d, J=2.6 Hz, 1H), 7.30 (dd, J=8.9, 3.0 Hz, 1H), 7.12 (dd, J=5.6, 2.6 Hz, 1H), 6.52 (d, J=8.9 Hz, 1H), 6.08 (s, 2H), 3.69 (d, J=9.9 Hz, 1H), 2.69 (d, J=11.1 Hz, 2H), 2.13 (s, 3H), 1.93 (t, J=11.2 Hz, 2H), 1.68-1.62 (m, 4H); MS (ESI) m/z: 328.2 (M+H+).

Workup

  1. stirringstirred at RT for 20 h
  2. washwashed with 1N NaOH
  3. dry with materialbrine and the organic layer was dried over Na2SO4
  4. concentrationconcentrated to dryness
  5. custompurified by silica gel chromatography (MeOH/DCM/NH4OH)

Sources & evidence

ORD record
ord-ca86c237541942ed9103c5e5888975e2
Source dataset
uspto-grants-2016_04
Patent number
US09309224B2

Reaction notes

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