Hydrochloric Acid → 4-(5-(4-(Pentyloxy)phenyl)-3-isoxazolyl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

The pure potassium 4-[5-(4-pentyloxyphenyl)isoxazol-3-yl]benzoate obtained in Example 2, tetrahydrofuran (131 L) and water (131 L) were put into a 1000 L glass-lined reaction chamber, heated to 45 to 55° C., and 1N hydrochloric acid (82 L) was added to this reaction mixture for 20 or more minutes. Furthermore, water (607 L) was added to the reaction mixture for 30 or more minutes at the same temperature. This reaction mixture was cooled to 25 to 35° C. and its pH was adjusted to 3 or less with 6N hydrochloric acid. The product was isolated by a centrifugal separator and washed with water (164 L) and acetone (82 L) and dried by a vacuum drier to obtain pure 4-[5-(4-pentyloxyphenyl)isoxazol-3-yl]benzoic acid (14.9 kg).

Provenance & Evidence