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Aluminium lithium hydride → 2-(5-Aminopyridin-2-yl)ethan-1-ol

HRID 1508734
Notes
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Reaction equation

HRID 1508734 reaction equation
[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C:9](OC)=[O:10])=[N:6][CH:7]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>C1COCC1>[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][CH2:9][OH:10])=[N:6][CH:7]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 21226445Aluminium lithium hydrideHCID 53659969Methyl 2-(5-aminopyridin-2-yl)acetate

Product 1

HCID 578866932-(5-Aminopyridin-2-yl)ethan-1-olYield 22.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of methyl 2-(5-aminopyridin-2-yl)acetate (0.250 g, 1.5 mmol) in THF (20 mL) at 0° C. was added lithium aluminum hydride (1.0 M, 3.75 mL, 3.75 mmol). The mixture was warmed to rt and stirred for 2 h. After this time, the reaction was quenched with water and NaOH (2 M), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated. The residue was purified by column chromatography (silica, dichloromethane/methanol) to afford the title compound (0.046 g, 22%) as an orange oil. MW=138.17. 1H NMR (CDCl3, 500 MHz) δ 8.01-7.97 (m, 1H), 6.97-6.92 (m, 2H), 3.96 (t, J=5.5 Hz, 2H), 3.60 (s, 2H), 2.89 (t, J=5.5 Hz, 2H); APCI MS m/z 139 [M+H]+.

Workup

  1. customAfter this time, the reaction was quenched with water and NaOH (2 M)
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationthe filtrate was concentrated
  5. customThe residue was purified by column chromatography (silica, dichloromethane/methanol)

Sources & evidence

ORD record
ord-1337593b26244ba89263b207e5845577
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09221843B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes