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2-Bromo-9-Fluorenone98%

2-Bromo-9-Fluorenone98% Preparation method: A mixture of 9.80 grams of 2- bromo -9 hydrogen fluorene and 120ml acetic anhydride was mixed in a 250 ml four neck flask. Slowly added 12 grams three chromium oxide within 6 hours, and then heated for 35 hours at 35 degrees, stirring for 1 hours,...

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2-Bromo-9-Fluorenone98%


Preparation method:

A mixture of 9.80 grams of 2- bromo -9 hydrogen fluorene and 120ml acetic anhydride was mixed in a 250 ml four neck flask. Slowly added 12 grams three chromium oxide within 6 hours, and then heated for 35 hours at 35 degrees, stirring for 1 hours, stirring at room temperature for 15 hours, and the reaction mixture was dark green. After the reaction, the filter was filtered out and the light green solid was filtered, and the filtrate was green. The light green solid first use 200 ml 2% hydrochloric acid wash, wash several times to the water washing liquid is light green. Filtrate was mixed and hydrolyzed with 200 ml of 2% hydrochloric acid and filtered after five hours to get light green solid and ink green filtrate. The light green solid water was washed for several times until the washing liquid was light green, solid yellow, vacuum dried at 50 degrees, dissolved in dichloromethane, filtered with silica gel, dried and obtained golden yellow solid. Acetic anhydride hydrolysate was extracted with dichloromethane and got yellow green solution. After adding dry anhydrous sodium sulfate, it was dried and dried. The green liquid was obtained. After adding 50 ml of trichloromethane, it was filtered with silica gel and dried to obtain golden yellow solid.

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Package

The package of all our chemical products reaching up to the industry standard, we usually use kraft drums or woven bags for our powder state products.

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