Hydrochloric Acid → Benzoic acid, 4-(3-chloropropoxy)-3-methoxy-

Temperature

40 °C

In a 300 mL volume glass flask equipped with a stirrer, a thermometer and a dropping funnel were placed 18.2 g (69.7 mmol) of methyl 4-(3-chloropropoxy)-3-methoxybenzoate (purity: 98 wt. %) prepared by procedures similar to the procedures of Reference Example III-3, 69.7 mL of an aqueous sodium hydroxide (2 mol/L), and 69.7 mL of methanol. The resulting mixture was heated to 40° C. for 4 hours in an argon gas atmosphere. After the reaction was complete, the reaction mixture was cooled to 10° C. and neutralized by 69.7 mL of hydrochloric acid (2 mol/L), to precipitate a crystalline product. The crystalline product was collected by filtration and dried under reduced pressure. There was obtained 16.2 g (isolated yield: 93.8%, purity: 99% in terms of area percentage determined by high performance liquid chromatography) of 4-(3-chloropropoxy)-3-methoxybenzoic acid as a white crystalline product.

1. customIn a 300 mL volume glass flask equipped with a stirrer
2. temperaturethe reaction mixture was cooled to 10° C.
3. customto precipitate a crystalline product
4. filtrationThe crystalline product was collected by filtration
5. customdried under reduced pressure

ORD record

ord-279f81db16fe416384e03e87d665f7f7

Source dataset

uspto-grants-2013_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08367824B2