Aluminum Chloride (AlCl3)
halogenation of aromatic groups
Friedel Crafts reactions
chlorination of aromatics
Friedel-Crafts acylation reaction
ketones to alcohols
Aluminum Chloride (AlCl3) A catalyst for the halogenation (especially chlorination) of aromatic groups, as well as in the Friedel Crafts reaction. Also used in the Meerwein-Ponndorf-Verley reduction Used in electrophilic chlorination AlCl3 promotes the chlorination of aromatic molecules such as benzene, when chlorine (Cl2) is added. The AlCl3 is regenerated, and HCl is a byproduct. Used in the Friedel-Crafts acylation reaction The Friedel-Crafts reaction is also promoted by AlCl3. In Friedel-Crafts acylation, the product is an aromatic ketone, and the byproduct is HCl. The Friedel-Crafts alkylation reaction is also promoted by AlCl3. Since AlCl3 will lead to the formation of a carbocation, one thing to watch out for in these cases is the possibility for rearrangement to more substituted carbocations. Used in the Meerwein-Ponndorf-Verley reduction AlCl3 will react with alcohols to make aluminum alkoxides. The aluminum alkoxides, once formed, will catalyze the Meerwein-Ponndorf-Verley reduction of ketones to give alcohols. Interestingly, the reductant in this case is not the aluminum, but the alcohol from the aluminum alkoxide. In the process, this alcohol is oxidized. Cymer knows the reactions of Aluminum Chloride (AlCl3) with organic compounds.
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