Reacción #5108

Ecuación de reacción

3-chlorolactic acid

p-chlorophenol

hydrochloric acid

→

3-(p-chlorophenoxy)-lactic acid

Disolventes

sodium hydroxide

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaunder reflux for two hours
2. 2
   FiltraciónThe resulting white crystals were filtered
3. 3
   workup.DISSOLUTIONdissolved in hot water
4. 4
   TemperaturaUpon cooling the product, 3-(p-chlorophenoxy)-lactic acid
5. 5
   Otrowas collected as clear crystals, 0.7 g, m.p. 135° to 136° C.

Procedimiento

A mixture of 1.8 g (14.7 mmoles) 3-chlorolactic acid and 3.4 g p-chlorophenol in 15 ml 3.3N sodium hydroxide was stirred under reflux for two hours. The mixture was cooled to room temperature and acidified to pH=3, with concentrated hydrochloric acid. The resulting white crystals were filtered and dissolved in hot water and the hot solution was adjusted to pH=1 with concentrated sulfuric acid. Upon cooling the product, 3-(p-chlorophenoxy)-lactic acid was collected as clear crystals, 0.7 g, m.p. 135° to 136° C.; Edelson, et al., Biochem Pharmacol 18, 2331 (1969) reported m.p. 137° to 138° C.

Fuente