1,3-Benzenediamine, N1,N1,N3,N3-tetramethyl- → 1(3H)-Isobenzofuranone, 3-[2,4-bis(dimethylamino)phenyl]-4,5,6,7-tetrachloro-3-[4-(diethylamino)-2-methylphenyl]-

Beteiligte Stoffe

Reaktionsschritte

In a manner similar to that of part B of Example 1 condensation of 2-(2-methyl-4-(diethylamino)benzoyl)-3,4,5,6-tetrachlorobenzoic acid (22.4 g.) and N,N,N',N'-tetramethyl-m-phenylenediamine (8.20 g.) in contact with acetic anhydride (75 g.) and recrystallization of the resulting product from toluene afforded 3-(2,4-bis(dimethylamino)phenyl)-3-(2-methyl-4-(diethylamino)phenyl)-4,5,6,7-tetrachlorophthalide (I: X = (CH3)2N, Y2 = CH3, Y4 = (CH3CH2)2N, Z4 = Z5 = Z6 = Z7 = Cl) (m.p. 236°-238° C.; after slurrying in acetone, 237°-239° C.).

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