TCI B6620 4-Phenylbutanoyl Chloride (CAS 18496-54-3) is a reactive acyl chloride building block supplied by TCI and available through AMI Scientific. Its combination of an aromatic ring and a highly electrophilic acyl chloride group makes it useful for amide, ester, and ketone bond formation under mild conditions. Researchers commonly apply it in Friedel-Crafts acylation, medicinal chemistry fragment synthesis, and analytical derivatisation work. The product is offered in 200 mg and 1 g pack sizes and must be stored tightly closed in a cool, dry, moisture-free environment.
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