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1895-39-2 - Sodium chlorodifluoroacetate, 97% - Chlorodifluoroacetic acid sodium salt - A15756 - Alfa Aesar

A15756 Sodium chlorodifluoroacetate, 97%

Codice CAS
1895-39-2
Sinonimi
Chlorodifluoroacetic acid sodium salt

Dimensioni Prezzo ($) Quantità Disponibilità
25g 66,20
100g 192,00
500g 844,00
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Sodium chlorodifluoroacetate, 97%

MDL
MFCD00064771
EINECS
217-586-0

Proprietà chimiche

Formula
ClCF2CO2Na
Peso formula
152.46
Punto di fusione
ca 195° dec.
Solubilità
Soluble in dimethoxyethane, diglyme (0.60 g mL-1), triglyme, dimethyl formamide.

Applicazioni

It is used as pharmaceutical intermediate. Reactions of aldehydes with triphenylphosphine and sodium chlorodifluoroacetate yield 1,1-difluoro olefins. It is a general reaction and a one step synthesis.

Note

Store at room temperature. Keep away from oxidizing agents.

Letteratura

Samuel A. Fuqua.; Warren G. Duncan.; Robert M. Silverstein.Synthesis of 1,1-Difluoro Olefins. II. Reactions of Ketones with Tributylphosphine and Sodium Chlorodifluoroacetate. J. Org. Chem. 1965, 30 (8),2543-2545 .

Samuel A. Fuqua.; Warren G. Duncan.; Robert M. Silverstein.A One-Step Synthesis of 1,1-Difluoro Olefins from Aldehydes. J. Org. Chem. 1965, 30 (4),1027-1029 .

Thermolysis in refluxing diglyme generates difluorocarbene: Proc. Chem. Soc., 81 (1960); Tetrahedron, 25, 1219 (1969); Tetrahedron Lett., 1319 (1973). In triglyme at 165o, gave better results in comparison with most other difluorocarbene precursors in cyclopropanation of an enol ether: Tetrahedron, 46, 5213 (1990).

In the presence of triphenyl- or tributylphosphine, the carbene is intercepted to give the difluoromethylenephosphorane, which can be used to convert aldehydes and ketones to 1,1-difluoroalkenes: Tetrahedron Lett., 1461 (1964); J. Org. Chem., 30, 1027, 2543 (1965); Org. Synth. Coll., 5, 390, 949 (1973):

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Dichiarazioni precauzionali: P261-P280-P305+P351+P338-P304+P340-P362-P312-P321-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Specific treatment (see label). Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Beilstein
4162363
Codice tariffe armonizzato
2915.90
TSCA
Yes

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