452920

Trimethylborat

≥98%

• Synonym(e): Borsäure-trimethylester, Methylborat
• Lineare Formel: B(OCH₃)₃
• CAS-Nummer: 121-43-7
• Molekulargewicht: 103.91
• Beilstein: 1697939
• EG-Nummer: 204-468-9
• MDL-Nummer: MFCD00008346
• UNSPSC-Code: 12352103
• PubChem Substanz-ID: 24868738
• NACRES: NA.22

Eigenschaften

• Dampfdichte: 3.59 (vs air)
• Qualitätsniveau: 200
• Assay: ≥98%
• Brechungsindex: n20/D 1.346 (lit.)
• bp: 68-69 °C (lit.)
• mp (Schmelzpunkt): −34 °C (lit.)
• Dichte: 0.932 g/mL at 20 °C (lit.)
• SMILES String: COB(OC)OC
• InChI: 1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3
• InChIKey: WRECIMRULFAWHA-UHFFFAOYSA-N

Beschreibung

Anwendung

Trimethyl borate reacts with a Grignard reagent or organolithium compounds to yield dimethyl boronates, which upon subsequent aqueous acid treatment afford corresponding boronic acids.[1] The resultant boronic acids or esters are useful intermediates in various cross-coupling reactions such as Suzuki coupling[2][3] and Chan-Lam coupling.[4] It is also used in the preparation of sodium borohydride.[5]

Rechtliche Hinweise

Rohm & Haas product

Sicherheitshinweise

• Piktogramme: GHS02,GHS06,GHS08
• Signalwort: Danger
• H-Sätze: H225,H301 + H311 + H331,H319,H360FD,H370
• P-Sätze: P210 - P280 - P301 + P310 - P303 + P361 + P353 - P304 + P340 + P311 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Irrit. 2 - Flam. Liq. 2 - Repr. 1B - STOT SE 1
• Zielorgane: Eyes
• Lagerklassenschlüssel: 3 - Flammable liquids
• WGK: WGK 1
• Flammpunkt (°F): 12.2 °F - (own results)
• Flammpunkt (°C): -11 °C - (own results)
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter