Pyridine → HCID 20348130, compound

Participants

Reaction Steps

0.01 moles of 1-(2,4,6-trichlorophenyl)-3-[3-{α-(2,4-di-t-amylphenoxy)acetamido}benzamido]-hydroxy-5-pyrazolone and 0.01 moles of p-nitrophenyl isocyanate are dissolved in 100 ml of dehydrated toluene, then added with 0.02 moles of pyridine and heated for 1 to 1.5 hours under reflux. After the reaction the solvent is eliminated under reduced pressure and n-hexane is added. The obtained solid is collected by filtration, then washed with n-hexane and dried to obtain the coupler (3) in a state of colorless powder with a melting point of 96°-100° C.

Provenance & Evidence