Benzylethanolamine → 2-[Benzyl({3-chloro-5-[methyl(propyl)amino]pyrazin-2-yl}methyl)amino]ethanol

HRID 1877856Notes

Reaction equation

HRID 1877856 reaction equation
C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].[Cl:15][C:16]1[C:17]([CH:27]=O)=[N:18][CH:19]=[C:20]([N:22]([CH3:26])[CH2:23][CH2:24][CH3:25])[N:21]=1.[CH2:29]([NH:36][CH2:37][CH2:38][OH:39])[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1.C(=O)([O-])O.[Na+]>C(#N)C.C(O)(=O)C>[CH2:29]([N:36]([CH2:27][C:17]1[C:16]([Cl:15])=[N:21][C:20]([N:22]([CH3:26])[CH2:23][CH2:24][CH3:25])=[CH:19][N:18]=1)[CH2:37][CH2:38][OH:39])[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1

Participants

7

Reactant 4

HCID 4348BenzylethanolamineHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 866490013-Chloro-5-[methyl(propyl)amino]pyrazine-2-carbaldehyde

Product 1

HCID 866490022-[Benzyl({3-chloro-5-[methyl(propyl)amino]pyrazin-2-yl}methyl)amino]ethanolYield 91.9%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6342AcetonitrileSolvent

Procedure

Sodium triacetoxyborohydride (0.74 g) was added to a solution of 3-chloro-5-[methyl(propyl)amino]pyrazine-2-carbaldehyde (0.50 g), N-benzylethanolamine (0.42 g) and acetic acid (0.40 mL) in acetonitrile (8 mL), and the mixture was stirred at room temperature for 6 hr. The reaction mixture was basified with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The aqueous layer was extracted again with ethyl acetate. The combined organic layer was washed with water and saturated brine, dried over magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography (solvent gradient: 10→40% ethyl acetate/hexane) to give the title compound (0.75 g, 91%) as a pale-yellow oil.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. extractionThe aqueous layer was extracted again with ethyl acetate
  3. washThe combined organic layer was washed with water and saturated brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel column chromatography (solvent gradient: 10→40% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-330341ce09364912bc3f9d44fb9e742b
Source dataset
uspto-grants-2012_11
Patent number
US08314088B2

Reaction notes

Loading…