Process for the monoacylation of...

Details Process for the monoacylation of... Process for the monoacylation of...

C - Chemistry, Metallurgy

07

D

260/249.9

C07D 251/44 (2006.01) C09B 62/08 (2006.01)

Patent

CA 1085394

PROCESS FOR THE MONOACYLATION OF AMINOHYDROXYNAPHTHALENE- SULPHONIC ACIDS WITH 2,4,6-TRIFLUORO-S-TRIAZINE Abstract of the Disclosure Process for producing compounds of the formula Image (1) wherein R is hydrogen, methyl or ethyl, and n is 1 or 2, which process comprises condensing aminohydroxynaphthalene- sulphonic acids of the formula Image (2) with 2,4,6-trifluoro-s-triazine, in an aqueous solution or suspension, within a pH range which is defined by PKN(R)H ? pH ? (pKOH - 2) wherein PKN(R)H and pKOH are the pK values respectively of the amino group and hydroxyl group of the aminohydroxynaphthalene- sulphonic acid and pH is the hydrogen exponent, to give compounds of the formula (1).

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