42731-38-4Relevant articles and documents
SULFONYL HYDRAZIDE COMPOUNDS AND A REGIO-SELECTIVE PROCESS TO PREPARE 4-AROYL PYRAZOLE DERIVATIVES
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Paragraph 0283, (2017/04/11)
Disclosed are compounds of Formula I, including all stereoisomers, (N-oxides), and salts thereof, wherein A and R are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula I, comprising reacting a compound of Formula II with an aroyl enolate salt of Formula III in the presence of an acid in an aqueous solvent mixture, wherein A, R and M are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula IV, comprising reacting a compound of Formula I with an aldehyde of Formula V in the presence of a secondary amine salt, wherein A, B and R are as defined in the disclosure.