Method for the preparation of fluorophthalamic compounds

Details Method for the preparation of fluorophthalamic compounds Method for the preparation of fluorophthalamic compounds

C - Chemistry, Metallurgy

07

D

260/601, 260/539

C07D 209/48 (2006.01) C07C 51/567 (2006.01) C07C 51/58 (2006.01) C07C 51/60 (2006.01) C07C 63/68 (2006.01)

Patent

CA 1169078

ABSTRACT Novel compounds and a process for preparing them are disclosed comprising: (A) Reacting a chlorophthalic anhydride of the formula Image wherein n is 1 or 2, with potassium fluoride or cesium fluoride to form a fluorophthalamic anhydride of the formula Image wherein n is as previously defined; (B) Reacting the fluorophthalic anhydride of (A) with ammonia to form an ammonium fluorophthalamate; (C) Acidifying the ammonium fluorophthalamate of (B) to form a fluorophthalamic acid; (D) Dehydrating the fluorophthalamic acid of (c) to form a fluorophthalamide; and (E) reacting the fluorophthalamide of (D) with an alkali metal salt to form an alkali metal fluorophthalamide.

393313

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