Sulfuric Acid → N-piperidino-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-pyrazole-3-carboxamide hydrogensulfate

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Reaction Steps

0.018 ml of concentrated sulfuric acid are added to a solution of 0.30 g of the compound obtained in example 195 in 3 ml of acetone. The white crystals formed are filtered off, washed with acetone and then ether, and dried under vacuum to give 0.31 g of the expected salt. m.p.=240° C.

Provenance & Evidence