404330

Sigma-Aldrich

1-Ethynyl-4-fluorobenzene

99%

Linear Formula:
FC6H4C≡CH
CAS Number:
Molecular Weight:
120.12
Beilstein/REAXYS Number:
1099285
MDL number:
PubChem Substance ID:
NACRES:
NA.22
Pricing and availability is not currently available.

Quality Level

assay

99%

refractive index

n20/D 1.516 (lit.)

bp

55-56 °C/40 mmHg (lit.)

mp

26-27 °C (lit.)

density

1.048 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

Fc1ccc(cc1)C#C

InChI

1S/C8H5F/c1-2-7-3-5-8(9)6-4-7/h1,3-6H

InChI key

QXSWHQGIEKUBAS-UHFFFAOYSA-N

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General description

1-Ethynyl-4-fluorobenzene (pFAB) is a fluorobenzene derivative. Trianionic pincer alkylidyne complex catalyzed polymerization of 1-ethynyl-4-fluorobenzene has been reported. The surface of the iodophenyl-terminated organic monolayers has been modified by Sonogashira coupling of the iodophenyl groups found on the surface with pFAB. Dimerization catalyzed by YN(TMS)23 and 4-chloroaniline gave exclusive formation of one of three possible enediynes in excellent yield.

Application

1-Ethynyl-4-fluorobenzene, a substituted phenylacetylene, may be used in the synthesis of aryl acetylenes, via Sonogashira type cross coupling reaction with various haloarenes in the presence of bis(μ-iodo)bis((-)-sparteine)dicopper(I) catalyst.
1-Ethynyl-4-fluorobenzene may be used in the synthesis of the following:
  • 3-(4-Fluorophenyl)-1H-isochromen-1-one by reacting with 2-iodobenzoic acid in the presence of copper catalyst.
  • 4-Bromo-3,5-difluoro-2,6-bis-(4-fluoro-phenylethynyl)-pyridine by reacting with 2,4,6-tribromo-3,5-difluoropyridine by palladium catalyzed Sonogashira reaction.
  • 1-(4-Fluorophenyl)-3-methoxy-3-(4-methoxyphenyl)propan-1-one by reacting with p-anisaldehyde.
  • 5-(4-Fluorophenyl)-1-(2-nitrobenzyl)-1H-1,2,3-triazole by reacting with 1-(bromomethyl)-2-nitrobenzene in the presence of sodium azide.

Packaging

1, 5 g in glass bottle

Pictograms

FlameExclamation mark

Signal Word

Danger

Hazard Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Hazard Codes

F,Xi

Risk Statement

36/37/38

Safety Statement

16-26-36

RIDADR

UN1325 - class 4.1 - PG 2 - Flammable solids, organic, n.o.s., HI: all

WGK Germany

WGK 3

Flash Point(F)

84.2 °F - closed cup

Flash Point(C)

29 °C - closed cup

Novel regio-and stereoselective dimerization of terminal alkynes catalyzed by rare-earth silylamide.
Komeyama K, et al.
Synthesis, 7, 1062-1066 (2004)
Polyhalogenoheterocyclic compounds. Part 53. Sonogashira reactions of 2, 4, 6-tribromo-3, 5-difluoropyridine.
Howardb JAK.
ARKIVOC (Gainesville, FL, United States), 11, 46-55 (2007)
Soumya Sarkar et al.
Journal of the American Chemical Society, 134(10), 4509-4512 (2012-02-23)
Synthesis, characterization, and catalytic alkyne polymerization results for the first trianionic pincer alkylidyne complex, [(t)BuOCO]W≡CC(CH(3))(3)(THF)(2) (6), are described. Complex 6 is a highly active catalyst for the polymerization of acetylenes and exhibits a high turnover number (4371), activity (1.05 ×...
Pd-catalyzed coupling reaction on the organic monolayer: Sonogashira reaction on the silicon (111) surfaces.
Qu M, et al.
Applied Surface Science, 255(5), 2608-2612 (2008)
Bis (μ-iodo) bis ((-)-sparteine) dicopper (I) catalyzed Sonogashira-type reaction under palladium and phosphine-free conditions.
Priyadarshini S, et al.
Tetrahedron Letters, 52(14), 1615-1618 (2011)

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