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556440

Sigma-Aldrich

1-Ethynyl-2,4-difluorobenzene

97%

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About This Item

Linear Formula:
HC≡CC6H3F2
CAS Number:
302912-34-1
Molecular Weight:
138.11
MDL number:
MFCD02093726
UNSPSC Code:
12352100
PubChem Substance ID:
24879558
NACRES:
NA.22

Assay

97%

mp

29-32 °C (lit.)

storage temp.

2-8°C

SMILES string

Fc1ccc(C#C)c(F)c1

InChI

1S/C8H4F2/c1-2-6-3-4-7(9)5-8(6)10/h1,3-5H

InChI key

HRUJQXRGWQWYDH-UHFFFAOYSA-N

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General description

1-Ethynyl-2,4-difluorobenzene is an alkyne bearing fluoro group in the phenyl ring.

Application

1-Ethynyl-2,4-difluorobenzene (CM) may be used to synthesize sulfonatedpoly(aryleneether)s containing CM and TFP [4-[Trifluorovinyl(oxy)]phenol]. It may also be employed for the preparation of 4-(2,4-difluorophenylethynyl)-3-methyl-5-phenylisoxazole.

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Warning

Hazard Statements

H228,H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Flam. Sol. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

4.1B - Flammable solid hazardous materials

WGK

WGK 3

Flash Point(F)

91.4 °F - closed cup

Flash Point(C)

33 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthesis of glycidyl triazolyl polymers using click chemistry.
Jung JH, et al.
Tetrahedron Letters, 48(37), 6442-6448 (2007)
Sulfonated poly (arylene ether) membranes containing perfluorocyclobutyl and ethynyl groups: Increased mechanical strength through chain extension and crosslinking.
Lee SB, et al.
Journal of Membrane Science , 456, 49-56 (2014)
Synthesis of 3, 4, 5-Trisubstituted Isoxazoles through Gold-Catalyzed Cascade Cyclization- Oxidative Alkynylation and Cyclization-Fluorination of 2-Alkynone O-Methyloximes.
Song D-H and Ryu J-S.
Bull. Korean Chem. Soc., 35(9), 2635-2644 (2014)

Articles

New Aromatic Terminal Alkynes

The terminal alkyne functionality has a wide range of applications including most recently the synthesis of spiropyran substituted 2,3-dicyanopyrazines and (±)-asteriscanolide, as well as conversion to enamines using resin-bound 2° amines.

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