Description

2-Bromo-3-methyl-2-butene (CAS No. 3017-70-7) is a high-purity halogenated organic compound with the molecular formula C₅H₉Br. This versatile intermediate features a reactive bromine substituent on a branched alkene backbone, making it a valuable building block for synthetic organic chemistry applications. The compound is supplied as a clear to slightly yellow liquid with a characteristic halogenated odor, and is rigorously tested to meet stringent purity standards suitable for research and industrial use. Its well-defined structure (IUPAC name: 2-bromo-3-methylbut-2-ene) ensures consistent performance in nucleophilic substitution reactions, coupling reactions, and as a precursor for more complex molecular architectures. Proper storage under inert atmosphere at recommended temperatures is essential to maintain product integrity.

Properties

• CAS Number: 3017-70-7
• Complexity: 68
• IUPAC Name: 2-bromo-3-methyl-but-2-ene
• InChI: InChI=1S/C5H9Br/c1-4(2)5(3)6/h1-3H3
• InChI Key: DBELOSOZLGEZBM-UHFFFAOYSA-N
• Exact Mass: 147.98876
• Molecular Formula: C5H9Br
• Molecular Weight: 149.03
• SMILES: CC(=C(C)Br)C
• Monoisotopic Mass: 147.98876
• Synonyms: 2-Bromo-3-methyl-2-butene, 3017-70-7, DTXSID50334362, DTXCID60285452, 686-012-2, 2-bromo-3-methylbut-2-ene, bromotrimethylethylene, 2-Butene, 2-bromo-3-methyl-, bromotrimethyl-ethylene, SCHEMBL1635837, SCHEMBL3157070, DAA01770, 2-Bromo-3-methyl-2-butene, 96%, MFCD00191852, AKOS015912448, AS-47772, CS-0188281, EN300-322642, F16090

Application

2-Bromo-3-methyl-2-butene serves as a key synthetic intermediate in organic synthesis, particularly in the preparation of more complex branched alkenes through elimination or substitution reactions. This compound finds utility in pharmaceutical research as a building block for active pharmaceutical ingredients (APIs) and in materials science for modifying polymer properties. The reactive bromine atom makes it valuable for cross-coupling reactions in catalytic processes, while its methyl-substituted alkene structure contributes to steric effects in reaction pathways.

Safety and Hazards

GHS Hazard Statements

• H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]
• H301 (97.5%): Toxic if swallowed [Danger Acute toxicity, oral]

Precautionary Statements

• P210, P233, P240, P241, P242, P243, P264, P270, P280, P301+P316, P303+P361+P353, P321, P330, P370+P378, P403+P235, P405, and P501

Hazard Classes and Categories

• Flam. Liq. 3 (100%)
• Acute Tox. 3 (97.5%)

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