tert-Butylethylmalonat

Bezeichnung:tert-Butylethylmalonat

CAS-Nr32864-38-3

Englisch Name:TERT-BUTYL ETHYL MALONATE

CBNumberCB0267409

SummenformelC9H16O4

Molgewicht188.22

MOL-Datei32864-38-3.mol

Synonyma

tert-Butylethylmalonat

tert-Butylethylmalonat physikalisch-chemischer Eigenschaften

Siedepunkt	83-85 °C/8 mmHg (lit.)
Dichte	0.994 g/mL at 25 °C (lit.)
Brechungsindex	n20/D 1.416(lit.)
Flammpunkt	189 °F
storage temp.	Inert atmosphere,Room Temperature
pka	11.86±0.46(Predicted)
Aggregatzustand	clear liquid
Farbe	Colorless to Almost colorless
Wasserlöslichkeit	Miscible with most common solvents. Immiscible with water.
BRN	1776681
InChIKey	OCOBFMZGRJOSOU-UHFFFAOYSA-N
CAS Datenbank	32864-38-3(CAS DataBase Reference)
NIST chemische Informationen	tert-Butyl ethyl malonate(32864-38-3)

Sicherheit

S-Sätze:	23-24/25
RIDADR	NA 1993 / PGIII
WGK Germany	3
HS Code	29171900

Gefahreninformationscode (GHS)

TERT-BUTYL ETHYL MALONATE Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
Clear colorless liquid
Verwenden
tert-Butyl ethyl malonate was used in the synthesis of polar ester-functionalized aliphatic polysulfone with remarkable thermal stability.
Verwenden
tert-Butyl ethyl malonate is used in the preparation of polar ester-functionalized aliphatic polysulfone. It is also a useful reagent for organic synthesis.
Synthesis Reference(s)
The Journal of Organic Chemistry, 39, p. 2114, 1974 DOI: 10.1021/jo00928a032
läuterung methode
A likely impurity is monoethyl malonate; check IR for OH bands at 3330 br cm-1 . To ca 50g of ester add ice cold NaOH (50g in 200mL of H2O and 200g of ice). Swirl a few times (filter off ice if necessary), place it in a separating funnel and extract with 2 x 75mL of Et2O. Dry the extract (MgSO4) (since traces of acid decompose the t-Bu group of the ester, the distillation flask has to be washed with aqueous NaOH, rinsed with H2O and allowed to dry). Addition of some K2CO3 or MgO before distilling is recommended to inhibit decomposition. Distil it under reduced pressure through a 10cm Vigreux column (p 11). Decomposition is evidenced by severe foaming due to autocatalytic decomposition and cannot be prevented from accelerating except by stopping the distillation and rewashing the distillation flask with alkali again. [Breslow et al. J Am Chem Soc 66 1287 1944, Hauser et al. J Am Chem Soc 64 2714 1942, Strube Org Synth Coll Vol IV 417 1963, Stube Org Synth 37 35 1957, Beilstein 2 IV 1884.]

TERT-BUTYL ETHYL MALONATE Upstream-Materialien And Downstream Produkte

tert-Butylethylmalonat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

32864-38-3, TERT-BUTYL ETHYL MALONATE Verwandte Suche:

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