Process comprises the combination of the two steps of condensing Y-benzaldehyde with NR2R3-aniline and 3-NRR1- benzoic acid, under acidic conditions to produce 2-[Y-phenyl) (4-NR2R3-aminophenyl)methyl]-5-NRR1-aminobenzoic acid, and oxidizing said benzoic acid to produce 3-(Y-phenyl)-3-(4-NR2R3-aminophenyl)-6-NRR1-aminophthalide.
工艺包括以下两个步骤的组合:在酸性条件下,将 Y-
苯甲醛与 NR2R3-
苯胺和 3-NRR1-
苯甲酸缩合,生成 2-[Y-苯基)(4-NR2R3-
氨基苯基)甲基]-5-NRR1-
氨基
苯甲酸;氧化所述
苯甲酸,生成 3-(Y-苯基)-3-(4-NR2R3-
氨基苯基)-6-NRR1-
氨基
邻苯二甲酸。