Methyltrioxorhenium(VII)

• Catalog No.: L18478
• CAS Number: 70197-13-6
• M. F.: CH3O3Re
• M. W.: 249.23972
• Purity: 98%

SYNONYMS

• Title: 甲基三氧化铼(VII)
• IUPAC name: methyltrioxorhenium
• IUPAC Traditional name: methylrhenium trioxide
• Synonyms: MTO

DATABASE IDS

• Beilstein Number: 3927932
• MDL Number: MFCD00192332
• CAS Number: 70197-13-6

PROPERTIES

• Purity: 98%
• Melting Point: 110-115°C
• GHS Hazard statements: H272
• European Hazard Symbols: Oxidising (O)
• GHS Precautionary statements: P221-P210-P220-P280-P370+P378A-P501A
• Risk Statements: 8
• Safety Statements: 17-26-39
• Storage Warning: Moisture & Light Sensitive
• TSCA Listed: 否
• Hazard Class: 5.1
• UN Number: UN1479
• Packing Group: II

REFERENCES

• For a brief feature on uses in synthesis, see: Synlett, 1849 (2004).
• Useful catalyst, soluble in organic solvents and water, and stable to air and acids: J. Organomet. Chem., 372, 351 (1989). Investigated by Herrmann's group as an alkene metathesis catalyst: Angew. Chem. Int. Ed., 30, 1636 (1991), a catalyst for clean epoxidation of alkenes with H₂O₂: Angew. Chem. Int. Ed., 30, 1638 (1991), and to promote the olefination of aldehydes with diazo esters: Angew. Chem. Int. Ed., 30, 1641 (1991). The activation of H₂O₂ in epoxidation and other reactions has been extensively studied; feature article: Chem. Commun., 479 (1999). Improved results in epoxidations with H₂O₂ in the presence of pyrazole have been reported by Herrmann: J. Organomet. Chem., 555, 293 (1998), and by Sharpless with pyrazole, pyridine or 3-cyanopyridine: Tetrahedron Lett., 40, 3991 (1999); J. Org. Chem., 65, 8651 (2000); see also Tetrahedron Lett., 39, 8521 (1998). For use in the Baeyer-Villiger oxidation of ketones, see: Angew. Chem. Int. Ed., 37, 1198 (1998); the reaction can also be carried out with H₂O₂ in ionic liquids at room temperature: Tetrahedron Lett., 44, 8991 (2003). Catalyzes the oxidative cleavage of ɑ-hydroxy carbonyl compounds to carboxylic acids with H₂O₂: Synth. Commun., 33, 3875 (2003). High yield aerobic oxidation of various organonitrogen compounds has been described: e.g. pyridines to N-oxides, anilines to nitrobenzenes and sec-amines to nitrones: Tetrahedron Lett., 44, 3235 (2003).