Benzaldehyde → (E)-tert-butyl 2-(benzylideneamino)acetate

HRID 980445Notes

Reaction equation

HRID 980445 reaction equation
[C:1]([O:5][C:6](=[O:9])[CH2:7][NH2:8])([CH3:4])([CH3:3])[CH3:2].[CH:10](=O)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.S([O-])([O-])(=O)=O.[Mg+2]>C1C=CC=CC=1>[CH:10](=[N:8][CH2:7][C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:9])[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

5

Reactant 3

HCID 240BenzaldehydeHCID 24083Sulfuric acid magnesium salt (1:1)HCID 151417Glycine tert-butyl ester

Product 1

HCID 14506168(E)-tert-butyl 2-(benzylideneamino)acetateYield 86.2%

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Procedure

To a solution of 33.61 gms of glycine t-butyl ester and 27.19 gms of benzaldehyde in 215 ml benzene was added 21.5 gms of magnesium sulfate in one portion with stirring at room temperature. The reaction was stirred 18 hours at room temperature, filtered, diluted with ether and washed with saturated sodium bicarbonate and brine. The ether solution was then dried over magnesium sulfate, concentrated and distilled to yield 48.41 gms (86%) of t-butyl N-benzylideneglycinate.

Workup

  1. stirringThe reaction was stirred 18 hours at room temperature
  2. filtrationfiltered
  3. additiondiluted with ether
  4. washwashed with saturated sodium bicarbonate and brine
  5. dry with materialThe ether solution was then dried over magnesium sulfate
  6. concentrationconcentrated
  7. distillationdistilled

Sources & evidence

ORD record
ord-e36f9e1b05604706a7af32dc412f8562
Source dataset
uspto-grants-1987_01
Patent number
US04637999

Reaction notes

Loading…