Bromnitromethan Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-S?tze Betriebsanweisung:
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S17:Von brennbaren Stoffen fernhalten.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
Bromonitromethane is a clear yellow liquid, It is a strong oxidizing agent with properties similar to nitromethane.
Bromonitromethane has been used:
in production of various protected α-bromo nitroalkane donors (including Fmoc) for use in Umpolung amide synthesis.
in preparation of (Z)-1-bromo-1-nitroalkenes via sodium iodide-catalyzed Henry reaction.
in diastereo- and enantioselective cyclopropanation of β,γ-unsaturated a-ketoesters via domino Michael-addition/intramolecular-alkylation strategy.
Verwenden
Bromonitromethane has received considerable attention as a one-carbon synthon for the synthesis of a variety of important organic intermediates.
Bromonitromethane is a key starting material for the preparation of the broad-spectrum antibiotic trovafloxacin, which contains the interesting 3-azabicyclo[ 3.1.0]hexane ring system.
it was used in the synthesis of 2-nitrobenzofuran and 2-nitro-2,3-dihydrobenzofuran-3-ols, nitrobenzothio-phenes, and nitrothiazoles, polyfunctionalized nitrocyclopropanes. It has also been utilized in the synthesis of 1-bromo-1-nitroalkan-2-ols and aryl nitromethanes. In addition, it could be used as a bromine donor.
synthetische
Bromonitromethane is commercially available and can also be easily prepared according to the procedures reported by Fishwick et al. A typical procedure is as following: freshly distilled nitromethane was stirred at 0℃ and bromine was dropped in 5 seconds. The resulted bromonitromethane could be used without further purification.
Bromnitromethan Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
