2-Amino-5-hydroxypyridine → HCID 90411099, compound

HRID 626587Notes

Reaction equation

HRID 626587 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[CH2:27][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]3)=[O:23])[CH:17]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 42319722-Amino-5-hydroxypyridineHCID 23665647Potassium tert-butoxideHCID 256064754-Chloro-N-cyclopropylpyridine-2-carboxamide

Product 1

HCID 90411099HCID 90411099, compoundYield 57.1%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 31374DimethylacetamideSolvent2×

Procedure

A solution of 2-amino-5-hydroxypyridine (0.578 g, 5.25 mmol) in DMA (8.75 mL) was treated with potassium tert-butoxide (0.663 g, 5.90 mmol), stirred at RT for 1 h, treated with a solution of 4-chloro-N-cyclopropylpicolinamide (0.86 g, 4.37 mmol) in DMA (8.75 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/EtOAc) to afford 4-((6-aminopyridin-3-yl)oxy)-N-cyclopropylpicolinamide (0.674 g, 57%). 1H NMR (400 MHz, DMSO-d6): δ 8.72 (d, J=5.0 Hz, 1H), 8.44 (d, J=5.6 Hz, 1H), 7.82 (d, J=2.9 Hz, 1H), 7.31-7.30 (m, 2H), 7.11 (dd, J=5.6, 2.6 Hz, 1H), 6.53 (d, J=8.9 Hz, 1H), 6.08 (s, 2H), 2.85-2.84 (m, 1H), 0.65-0.62 (m, 4H); MS (ESI) m/z: 271.1 (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/EtOAc)

Sources & evidence

ORD record
ord-2ab53b27fbfe49faab008a51ec2bec12
Source dataset
uspto-grants-2016_04
Patent number
US09309224B2

Reaction notes

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