Methyltriphenylphosphonium bromide, CAS No. 1779-49-3

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1779-49-3

Catalog No. EBD18806

CAS 1779-49-3

Name Methyltriphenylphosphonium bromide

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Basic Information

Synonyms: MethylTriphenylPhosphoniumBromide TriphenylmethylphosphoniumBromide Bromo(methyl)triphenylphosphorane methyltriphenyl-phosphoniubromide Phosphonium,methyltriphenyl-,bromide triphenylphosphonium (Methyl)triphenylphosphoniumbromide methyltriphenylphosphoniumbromide>98% methyltriphenylphosphoniumbromidelowwater Ph3P(1+)*CH3Br(1-)

Molecular Formula: C19H18BrP

Molecular Weight: 357.22

MDL Number: MFCD00011804

Categories: Synthetic Chemistry > Basic Synthetic Reagents > C-C Bond Formation Reagents

Product Description:

Methyltriphenylphosphonium bromide is a quaternary phosphonium salt with the formula CH_P(C_H_)_Br. It is a white to off-white crystalline solid that is hygroscopic and soluble in polar organic solvents. Its primary application is as a Wittig reagent precursor. Upon treatment with a strong base (e.g., n-butyllithium or sodium hydride), it generates the corresponding phosphorus ylide, which is a key intermediate for the synthesis of alkenes from carbonyl compounds. This reaction is fundamental in organic synthesis for constructing carbon-carbon double bonds with defined stereochemistry. This compound is widely used in laboratory-scale research and industrial process development for the preparation of pharmaceuticals, agrochemicals, and fine chemicals. It should be handled with care as it may cause skin and eye irritation.

Physical Properties

Melting Point: 230-234 °C(lit.)

Flash Point: >240°C

Solubility: H2O: 0.1 g/mL, clear

Storage: 2-8°C

Analytical Data

Appearance: white powder