Reacción #65822

Ecuación de reacción

methyl (R)-3-hydroxytetradecanoate

bromoacetyl bromide

pyridine

→

(R)-3-[(bromoacetyl)oxy]tetradecanoic acid methyl ester

Rendimiento 90.0%

Disolventes

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe mixture was removed from the cold bath for 30 min
2. 2
   Filtraciónfiltered through celite
3. 3
   Lavadowashing with 75 ml ether
4. 4
   LavadoThe filtrate was washed with 2×100 ml H2O and with 50 ml 10% NaHCO3
5. 5
   SecadoThe ether was dried over MgSO4
6. 6
   Otroremoved by rotary evaporation

Procedimiento

To a rapidly-stirred slurry of 1.29 g (4.99 mmol) methyl (R)-3-hydroxytetradecanoate and 0.45 ml (5.2 mmol) bromoacetyl bromide in 25 ml hexanes at 0° C. in a flame-dried flask under N2 was added 0.42 ml (5.2 mmol)pyridine all at once. The mixture was removed from the cold bath for 30 min. The mixture was suction filtered through celite, washing with 75 ml ether. The filtrate was washed with 2×100 ml H2O and with 50 ml 10% NaHCO3. The ether was dried over MgSO4 and removed by rotary evaporation, giving 1.70 g (90%) crude (R)-3-[(bromoacetyl)oxy]tetradecanoic acid methyl ester as a yellow oil. Analytically pure samples could be prepared by subjecting the oil to radial chromatography, eluting with CH2Cl2.

Fuente