77207-01-3Relevant academic research and scientific papers
Preparation method of acifluorfen
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Paragraph 0063; 0069; 0070, (2016/10/27)
The invention relates to the field of herbicides and specifically discloses a preparation method of acifluorfen. The acifluorfen is a compound shown by formula (1) in the specification. The method comprises the following steps: (1) dropwise adding the compound shown by formula (2) in the specification into an organic solvent containing alkali carbonate and the compound shown by formula (3) in the specification so that the compound shown by formula (3) contacts and reacts with the compound shown by formula (2) to obtain the compound shown by formula (4); and (2) performing alkaline hydrolysis and acidification of the compound shown by formula (4) to obtain the compound shown by formula (1). By adopting the preparation method, the target compound can be prepared with relatively high yield in relatively mild reaction conditions.
Process for preparing phenoxybenzoic acids
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, (2008/06/13)
Phenoxybenzoic acids and esters of the formula STR1 wherein R is hydrogen or alkyl and X is hydrogen or chlorine can be prepared by reacting the disalt of 3-hydroxybenzoic acid with a 3-chloro-4-halobenzotrifluoride. These phenoxybenzoic acids and esters can then be selectively nitrated to give the corresponding 2-nitro-5-(substituted)phenoxybenzoic acids and esters. The nitrated esters can also be prepared by first nitrating the corresponding acid and then esterifying with an appropriate alcohol.
