反应详情

1,2-Dimethyl-3,5-diphenylpyrazolium hydroxide in a H2O solution was titrated with 4-chloro-2-methylphenoxyacetic acid (MCPA), a known herbicide until pH 7 was obtained and retained for 48 hours. MCPA was added as a solid and slowly dissolved. ##STR7## The H2O solution was evaporated to a low volume (oil) and toluene/acetone azeotroped several times. Hexane (5% acetone) was added and the oil solidified to a light yellow solid and was filtered, washed with hexane and dried. 6.5 Grams, melting point 138° C. to 140° C. of a light yellow solid was obtained.

1. customa known herbicide until pH 7 was obtained
2. dissolutionslowly dissolved
3. custom##STR7## The H2O solution was evaporated to a low volume (oil) and toluene/acetone azeotroped several times
4. additionHexane (5% acetone) was added
5. filtrationwas filtered
6. washwashed with hexane
7. customdried