1-METHYL-1-(TRIMETHYLSILYL)ALLENE
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- CAS-Nr.
- 74542-82-8
- Englisch Name:
- 1-METHYL-1-(TRIMETHYLSILYL)ALLENE
- Synonyma:
- 3-(Trimethylsilyl)-1,2-butadiene;1-METHYL-1-(TRIMETHYLSILYL)ALLENE;Buta-2,3-Dien-2-Yl(Trimethyl)Silane;3-(Trimethylsilyl)-1,2-butadiene 98%;Silane, trimethyl(1-methyl-1,2-propadien-1-yl)-
- CBNumber:
- CB7184217
- Summenformel:
- C7H14Si
- Molgewicht:
- 126.27
- MOL-Datei:
- 74542-82-8.mol
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1-METHYL-1-(TRIMETHYLSILYL)ALLENE Eigenschaften
- Siedepunkt:
- 111-112 °C(lit.)
- Dichte
- 0.759 g/mL at 25 °C(lit.)
- Brechungsindex
- n20/D 1.444(lit.)
- Flammpunkt:
- 19 °F
- L?slichkeit
- sol CH2Cl2, benzene, THF, Et2O, and most organic
solvents.
Sicherheit
- Risiko- und Sicherheitserkl?rung
- Gefahreninformationscode (GHS)
| Kennzeichnung gef?hrlicher |
F |
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| R-S?tze: |
11 |
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| S-S?tze: |
16 |
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| RIDADR |
UN 1993 3/PG 2 |
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| WGK Germany |
3 |
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| Bildanzeige (GHS) |
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| Alarmwort |
Achtung |
| Gefahrenhinweise |
| Code |
Gefahrenhinweise |
Gefahrenklasse |
Abteilung |
Alarmwort |
Symbol |
P-Code |
| H225 |
Flüssigkeit und Dampf leicht entzündbar. |
Entzündbare Flüssigkeiten |
Kategorie 2 |
Achtung |
![GHS hazard pictograms]() src="/GHS02.jpg" width="20" height="20" /> |
P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 |
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| Sicherheit |
| P210 |
Von Hitze, hei?en Oberfl?chen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen. |
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1-METHYL-1-(TRIMETHYLSILYL)ALLENE Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
Physikalische Eigenschaften
bp 111 °C; bp 54–56 °C/90 mmHg
Verwenden
It is widely used as propargylic anion equivalents; three-carbon synthons for
[3 + 2] annulations leading to five-membered compounds including
cyclopentenes,4 dihydrofurans, pyrrolines, isoxazoles,
furans, and azulenes.
synthetische
1-methyl-1-(trialkylsilyl)allenes can be
conveniently prepared by the method of Vermeer. Silylsubstituted
propargyl mesylates thus undergo SN2 displacement
by the organocopper reagent generated from methylmagnesium
chloride, copper(I) bromide, and lithium bromide
1-Methyl-1-(trimethylsilyl)allene is produced in 52% yield
from commercially available (trimethylsilyl)propargyl alcohol
in this fashion (eq 1). The t-butyldimethylsilyl and triisopropylsilyl
analogs are synthesized by the same method in 90%
and 58% yield, respectively. Propargyl alcohols bearing these
and other trialkylsilyl groups can be prepared by treatment
of propargyl alcohol with n-butyllithium and the appropriate
trialkylsilyl chloride. Allenylsilanes bearing other C-1 substituents
can be prepared in an analogous manner by using the
appropriate Grignard reagents.
1-METHYL-1-(TRIMETHYLSILYL)ALLENE Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
1-METHYL-1-(TRIMETHYLSILYL)ALLENE Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 14)Lieferanten
74542-82-8()Verwandte Suche:
- 1-METHYL-1-(TRIMETHYLSILYL)ALLENE
- 3-(Trimethylsilyl)-1,2-butadiene
- 3-(Trimethylsilyl)-1,2-butadiene 98%
- Buta-2,3-Dien-2-Yl(Trimethyl)Silane
- Silane, trimethyl(1-methyl-1,2-propadien-1-yl)-
- 74542-82-8
- C7H14Si
- H2CCCCH3SiCH33
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