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ChemicalBook CAS DataBase List 2-bromo-9-hexyl-9H-carbazole

2-bromo-9-hexyl-9H-carbazole synthesis

4synthesis methods
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Yield:864550-95-8 94%

Reaction Conditions:

Stage #1: 2-bromo-9H-carbazolewith tetrabutylammomium bromide;sodium hydroxide at 20; for 0.0833333 h;
Stage #2: 1-bromo-hexane for 12 h;

Steps:

1.I (I) Synthesis of alkyl chain carbazole group

To a 250 mL three-necked flask, 2-bromocarbazole (6.0 g, 24.38 mmol), sodium hydroxide solution (50%) 4 ml, tetrabutylammonium bromide (0.4 g, 1.24 mmol), and the temperature was stirred for 5 min at room temperature. Bromine hexane (8.045 g, 48 mmol) was added dropwise with a syringe.After 12 h of reaction, the eluent was purified by column chromatography to petroleum ether to afford product 1a as an oil, which, after vacuum drying, weighed 7.57 g (yield about 94%).

References:

CN108424424,2018,A Location in patent:Paragraph 0040; 0042; 0043