TCI C0823 Methyl 4-Chlorobutyrate (CAS 3153-37-5) is a bifunctional aliphatic building block supplied in a 25 mL pack. Its primary alkyl chloride and ester group allow sequential transformations, making it a convenient precursor to five-membered rings such as lactams and lactones. Synthetic and medicinal chemists use it for nucleophilic alkylation, chain extension, and the assembly of pharmaceutical and agrochemical intermediates. Handle it in a fume hood with suitable gloves and eye protection, and store the tightly closed bottle in a cool, dry place away from light.
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