Toluene → 9-Benzylcarbazole-3,6-dicarboxaldehyde

Participants

Reaction Steps

7.0 g (27.2 mmol) of 9-benzylcarbazole (4d), 11.8 g (161.4 mmol) of DMF, 4.0 g (29.3 mmol) of zinc chloride, 17.0 g (110.9 mmol) of phosphorus oxychloride and 100 ml of toluene were allowed to react and after treated in the same manner as with Example 1 (1), and treated by silica gel column chromatography (eluent: toluene, and then ethyl acetate) to obtain crystals. These crystals were recrystallized from ethyl acetate toluene to obtain 3.0 g of 3,6-diformyl-9-benzylcarbazole.

Provenance & Evidence