Hydrochloric Acid → (2E)-3-(5-{[(3R)-1-cyclohexyl-3-piperidinyl]amino}-2-pyrazinyl)acrylic acid

HRID 2376048Notes

Reaction equation

HRID 2376048 reaction equation
[CH:1]1([N:7]2[CH2:12][CH2:11][CH2:10][C@@H:9]([NH:13][C:14]3[N:15]=[CH:16][C:17](/[CH:20]=[CH:21]/[C:22]([O:24]CC)=[O:23])=[N:18][CH:19]=3)[CH2:8]2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[OH-].[Na+].Cl>CCO>[CH:1]1([N:7]2[CH2:12][CH2:11][CH2:10][C@@H:9]([NH:13][C:14]3[N:15]=[CH:16][C:17](/[CH:20]=[CH:21]/[C:22]([OH:24])=[O:23])=[N:18][CH:19]=3)[CH2:8]2)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 86603668HCID 86603668, compound

Product 1

HCID 68964465(2E)-3-(5-{[(3R)-1-cyclohexyl-3-piperidinyl]amino}-2-pyrazinyl)acrylic acidYield 99.9%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a solution of mixture of ethyl (2E)-3-(5-{[(3R)-1-cyclohexyl-3-piperidinyl]amino}-2-pyrazinyl)acrylate (227 mg) in EtOH (2 mL) was added 1N sodium hydroxide solution (1.3 mL) at ambient temperature and the mixture was allowed to stand for 18 hrs. The reaction mixture was adjusted to pH 6.0 with 1 mol/L hydrochloric acid and evaporated in vacuo. The residue was dissolved in a mixture of chloroform and MeOH (5-1) and the precipitate was filtered off. The filtrate was concentrated in vacuo to give (2E)-3-(5-{[(3R)-1-cyclohexyl-3-piperidinyl]amino}-2-pyrazinyl)acrylic acid (209 mg) as a solid.

Workup

  1. customevaporated in vacuo
  2. dissolutionThe residue was dissolved in a mixture of chloroform and MeOH (5-1)
  3. filtrationthe precipitate was filtered off
  4. concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-1b6f24e888e24fa48295b01f581166a1
Source dataset
uspto-grants-2008_12
Patent number
US07465731B2

Reaction notes

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