Water → 3-Bromocarbazole

関与物質

反応手順

32 g (0.19 mmol) of 9H-carbazole was put into a 2 L Erlenmeyer flask, and then ether acetate (1.2 L) was added thereto so that the 9H-carbazole was dissolved in the ether acetate. To this solution was added 34 g (0.19 mol) of N-bromosuccinimide (NBS), and the mixture was stirred for about 15 hours in the air at room temperature. After the stirring, water was added to the mixture so that the precipitate was dissolved in the mixture. The organic layer of this mixture was washed with water three times and then with a saturated saline solution once. Magnesium sulfate was added so that the organic layer was dried. After the drying, the mixture was subjected to gravity filtration. The obtained filtrate was condensed to give a white solid. The obtained solid was recrystallized with ether acetate/hexane to give 36 g of a white powdered solid, which was the object of the synthesis, at a yield of 67%. A synthesis scheme of Step 1 is shown in (c-1) given below.

情報源と証拠