Trifluormethansulfons?ure-tris(1-methylethyl)-silylester Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R34:Verursacht Ver?tzungen.
S-S?tze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S27:Beschmutzte, getr?nkte Kleidung sofort ausziehen.
Chemische Eigenschaften
clear light brown to orange-brown liquid
Physikalische Eigenschaften
Colorless oil; bp 83–87 °C/1.7 mmHg; d 1.173
g cm?3.
Verwenden
Triisopropylsilyl Trifluoromethanesulfonate is a highly reactive silylating agent and Lewis acid capable of converting
primary and secondary alcohols to the corresponding triisopropylsilyl
ethers and converting ketones and lactones into
their enol silyl ethers; protection of terminal alkynes; promoting
conjugate addition of alkynylzinc compounds to α,β-enones;
preparation of (triisopropylsilyl)diazomethane, participating in the following (but not limited to) reactions: Silylation of Alcohols, Formations of Enol Silyl Ethers, Alkynyltriisopropylsilanes, Conjugate Addition of Alkynylzinc Bromides, (Triisopropylsilyl)diazomethane, Triisopropylsiloxycarbonyl (Tsoc) and BIPSOP Protecting Groups for Amines, TIPS Protection for Oxazoles/Regioselective Trapping of C-2 Oxazole Anions, Benzannulation Using Triisopropylsilyl Vinyl Ketenes, Cyclization of 1-Silyloxy-1,5-diynes, Desymmetrization of Tartaric Acid Esters etc.
synthetische
To 38.2 g (0.242 mol) of triisopropylsilane
at 0°C under argon is added 23.8 mL (0.266 mol) of trifluoromethanesulfonic
acid dropwise. The solution is stirred at
22°C for 16 h, at which time no further hydrogen gas evolves
(removed through a bubbler). The resulting product is distilled
through a 30-cm vacuum jacketed Vigreux column under
reduced pressure: 71.7 g (97% yield) of TIPS triflate;
bp 83–87°C/1.7 mmHg.
Reaktivit?t anzeigen
Triisopropylsilyl Trifluoromethanesulfonate is a highly reactive silylating agent and Lewis acid capable of converting primary and secondary alcohols to the corresponding triisopropylsilyl ethers and converting ketones and lactones into their enol silyl ethers; protection of terminal alkynes; promoting conjugate addition of alkynylzinc compounds to α,β-enones; preparation of (triisopropylsilyl)diazomethane).
Trifluormethansulfons?ure-tris(1-methylethyl)-silylester Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
