Benzaldehyde → HCID 11008215, compound

Temperature

0 °C

A one liter reaction flask is charged with ornithine ethyl ester dihydrochloride (93.29 g) and methylene chloride (200 ml). The suspension is stirred and cooled to 0° C. The reactor is then charged with a solution of benzaldehyde (86 g) in methylene chloride (200 ml). The temperature is maintained at 0° C., and a solution of triethylamine (90 g) in methylene chloride (140 ml) is added during one hour. The mixture is stirred overnight at room temperature. Water (150 ml) is added, and after decantation, the organic layer is washed with water (3×150 ml) and brine (2×100 ml). The organic layer is dried over sodium sulfate (50 g). After filtration, the solvent is evaporated under reduced pressure. The oily residue obtained is well stirred with hexane (600 ml) during one hour at room temperature. After filtration and drying under reduced pressure, dibenzylidine ornithine ethyl ester is obtained as a white solid, m.p. 41.4° C.; assay: 97.33%.

1. customA one liter reaction flask
2. temperatureThe temperature is maintained at 0° C.
3. stirringThe mixture is stirred overnight at room temperature
4. washafter decantation, the organic layer is washed with water (3×150 ml) and brine (2×100 ml)
5. dry with materialThe organic layer is dried over sodium sulfate (50 g)
6. filtrationAfter filtration
7. customthe solvent is evaporated under reduced pressure
8. customThe oily residue obtained
9. filtrationAfter filtration
10. customdrying under reduced pressure

ORD record

ord-661161ad65fb4aaca1699073447c36e3

Source dataset

uspto-grants-1983_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04413141