Reacción #1683

Ecuación de reacción

trifluoroacetic acid

Boc-D-Phe-Pro-OBn

anisole

→

white powder

Rendimiento 85.0%

D-Phe-Pro-OBn.TFA

Rendimiento 85.0%

Disolventes

dichloromethane

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe solvents were evaporated in vacuo
2. 2
   workup.DISSOLUTIONthe thick oily residue was dissolved in diethyl ether (1.5 L)
3. 3
   Otro(72 hours)
4. 4
   FiltraciónThe white precipitate was filtered
5. 5
   Lavadowashed with diethyl ether (300 mL)
6. 6
   Otrodried

Procedimiento

To a stirring solution of Boc-D-Phe-Pro-OBn (68 g, 150 mmol) in dichloromethane (50 mL) at 0° C., was added anisole (20 mL) followed by trifluoroacetic acid (400 mL). After stirring for 3 hours, the solvents were evaporated in vacuo and the thick oily residue was dissolved in diethyl ether (1.5 L) and refrigerated (72 hours). The white precipitate was filtered, washed with diethyl ether (300 mL) and dried to yield 59.4 g (85%) of white powder.

Fuente