Chemical Identity and Physical Properties

2-Bromo-1-(4-(methylthio)phenyl)ethanone (Aladdin SKU: B170296) is an alpha-bromoketone featuring a para-methylthio (methylsulfanyl) substituent on the phenyl ring. Its molecular formula is C₉H₉BrOS, incorporating three key functional elements: an electrophilic alpha-carbon bearing a bromine atom, a carbonyl group activating that carbon toward nucleophilic substitution, and an aryl thioether that modulates the electron density of the aromatic ring.

The para-methylthio group is a moderate electron-donating substituent via resonance, which slightly raises electron density at the carbonyl carbon relative to unsubstituted phenacyl bromide. This electronic profile influences both reactivity and selectivity in downstream transformations. The compound is typically encountered as a pale solid and should be handled with appropriate personal protective equipment given the lachrymatory and vesicant potential common to alpha-haloketone derivatives.

Synthesis Applications and Reactivity

The defining reactivity of 2-Bromo-1-(4-(methylthio)phenyl)ethanone derives from the alpha-bromoketone motif. The carbonyl group exerts a strong electron-withdrawing inductive effect that renders the adjacent C–Br bond highly susceptible to S_N2 displacement by a wide range of nucleophiles, including amines, thiols, azides, and heteroaromatic nitrogen atoms.

A principal application is the synthesis of heterocyclic compounds. Alpha-bromoketones react with binucleophilic reagents such as thioamides, dithiocarbamates, and amidines to afford thiazoles, imidazoles, oxazoles, and related five-membered heterocycles. The para-methylthio aryl group in B170296 imparts additional structural complexity and lipophilicity to the resulting heterocyclic products, making them attractive candidates in medicinal chemistry programs targeting enzymes and receptors.

Additionally, this compound may serve as a precursor in Staudinger ligation chemistry, N-alkylation of indoles or pyrroles, and as a handle for further elaboration of the thioether to sulfoxide or sulfone oxidation states, expanding the synthetic utility of products derived from this building block.

Handling, Safety, and Storage

As a member of the alpha-haloketone chemical class, 2-Bromo-1-(4-(methylthio)phenyl)ethanone should be treated as a potentially irritating and lachrymatory substance. Researchers should consult the Safety Data Sheet (SDS) provided by Aladdin Scientific before use. Standard precautions include working in a well-ventilated fume hood, wearing nitrile gloves, safety goggles, and a laboratory coat.

The compound should be stored in a tightly sealed container under cool, dry conditions and protected from light and atmospheric moisture. Prolonged exposure to humidity may promote hydrolysis of the alpha-bromo group. Incompatibilities typical of alpha-haloketones include strong bases, reducing agents, and reactive nucleophiles that could cause uncontrolled reaction. Waste disposal must comply with local and institutional regulations for halogenated organic compounds.

Ordering and Availability from Aladdin Scientific

2-Bromo-1-(4-(methylthio)phenyl)ethanone is available from Aladdin Scientific under SKU B170296. Researchers and procurement personnel can obtain current pricing, available pack sizes, purity specifications, and Certificate of Analysis documentation directly through the Aladdin Scientific website or by contacting the customer service team.

When placing an order, it is recommended to confirm the required purity grade for your application — synthetic-grade material may be suitable for exploratory chemistry, while higher-purity offerings may be preferred for reproducibility-critical research. Aladdin Scientific's reagents are subject to quality control processes; please refer to the product page for the most current specification details.