1,2-Vinylenebis(triphenylphosphonium bromide) monohydrate

• Catalog No.: L00956
• CAS Number: 54770-27-3
• M. F.: C38H32Br2P2
• M. W.: 710.416202
• Purity: 98%

SYNONYMS

• Title: 1,2-亚乙烯基双(三苯基溴化膦)单水合物
• IUPAC name: triphenyl[(E)-2-(triphenylphosphaniumyl)ethenyl]phosphanium dibromide
• IUPAC Traditional name: triphenyl[(E)-2-(triphenylphosphaniumyl)ethenyl]phosphanium dibromide

DATABASE IDS

• EC Number: 259-334-2
• CAS Number: 54770-27-3
• MDL Number: MFCD00040548
• Beilstein Number: 3583793

PROPERTIES

• Purity: 98%
• Melting Point: ca 236-250°C
• GHS Hazard statements: H315-H319-H335
• European Hazard Symbols: Irritant (Xi)
• GHS Precautionary statements: P261-P305+P351+P338-P302+P352-P321-P405-P501A
• Risk Statements: 36/37/38
• Safety Statements: 26-37
• Storage Warning: Hygroscopic
• TSCA Listed: 否

REFERENCES

• Conjugate addition of alcohols in the presence of triethylamine, followed by elimination and removal of the second phosphonium salt by base-induced cleavage, leads to vinyl ethers: Synthesis, 736 (1975). Similarly, other nucleophiles (e.g. phenols or thiols) can be used to replace one of the phosphonium groups by addition-elimination: Bull. Soc. Chim. Fr., 1421 (1974). With bifunctional nucleophiles, cyclization can occur to give an intermediate for the formylolefination of aldehydes by the Wittig reaction: Synthesis, 826 (1978):